:root {
    --bg: #f4fbff;
    --panel: #fffef8;
    --ink: #172033;
    --muted: #5b6577;
    --line: #d6e1f2;
    --teal: #0f8f8c;
    --coral: #f2634c;
    --gold: #f5b82e;
    --green: #35a65b;
    --blue: #367cf6;
    --purple: #7657e8;
    --pink: #e85aa2;
    --success: #2f9c58;
    --danger: #cf3f4e;
    --shadow: 0 18px 42px rgba(23, 32, 51, 0.12);
    --soft-shadow: 0 8px 20px rgba(23, 32, 51, 0.08);
}

* {
    box-sizing: border-box;
    letter-spacing: 0;
}

body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(circle, rgba(54, 124, 246, 0.12) 1px, transparent 2px) 0 0 / 28px 28px,
        radial-gradient(circle, rgba(242, 99, 76, 0.12) 1px, transparent 2px) 14px 14px / 28px 28px,
        linear-gradient(180deg, #f4fbff 0%, #fff7df 58%, #f4fff4 100%);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select {
    font: inherit;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 20px;
    min-height: 72px;
    padding: 14px clamp(18px, 4vw, 52px);
    border-bottom: 2px solid rgba(54, 124, 246, 0.12);
    background: rgba(255, 254, 248, 0.94);
    backdrop-filter: blur(12px);
    box-shadow: 0 8px 24px rgba(23, 32, 51, 0.06);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 900;
}

.brand-mark,
.badge-mark {
    display: inline-grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--ink);
    color: #fff;
    font-weight: 900;
}

.badge-mark {
    background:
        linear-gradient(135deg, var(--purple), var(--blue));
    box-shadow: 0 5px 0 rgba(23, 32, 51, 0.14);
}

.brand-mark {
    background:
        linear-gradient(135deg, var(--gold), #fff176 48%, var(--coral));
    color: var(--ink);
    box-shadow: 0 6px 0 rgba(23, 32, 51, 0.16);
    transition: transform 160ms ease, background 160ms ease;
}

.brand-mark:hover {
    transform: translateY(-2px) rotate(-1deg);
}

.brand-logo-mark {
    overflow: hidden;
    background: transparent;
    width: 149px;
    height: 40px;
    border-radius: 0;
    box-shadow: none;
}

.brand-logo-icon,
.brand-logo-full {
    display: block;
    width: 100%;
    height: 100%;
}

.brand-logo-full {
    object-fit: contain;
}

.brand-mark.egg-tap {
    transform: scale(1.08) rotate(-2deg);
    background: var(--gold);
}

.brand-logo-mark.egg-tap {
    background: transparent;
}

.nav-links {
    display: flex;
    gap: 8px;
    margin-left: auto;
}

.nav-links a,
.user-pill {
    min-height: 38px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 8px;
    color: var(--muted);
    font-weight: 800;
    transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.nav-links a:hover,
.user-pill:hover {
    background: #e6f2ff;
    color: var(--ink);
    transform: translateY(-1px);
}

.nav-links a.active,
.nav-links a[aria-current="page"],
.user-pill.active,
.user-pill[aria-current="page"] {
    background: var(--ink);
    color: #ffffff;
    box-shadow: 0 6px 0 rgba(23, 32, 51, 0.14);
}

.nav-links a.active:hover,
.nav-links a[aria-current="page"]:hover,
.user-pill.active:hover,
.user-pill[aria-current="page"]:hover {
    background: var(--teal);
    color: #ffffff;
}

.user-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 26px;
    height: 26px;
    flex: 0 0 auto;
    border: 2px solid rgba(255, 255, 255, 0.85);
    border-radius: 50%;
    background: #ffffff;
    object-fit: cover;
}

.user-avatar-initial {
    display: inline-grid;
    place-items: center;
    border-color: var(--line);
    background: var(--gold);
    color: var(--ink);
    font-size: 0.78rem;
    font-weight: 900;
}

.page {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 28px 0 56px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
}

.page-loading {
    position: fixed;
    inset: 0;
    z-index: 65;
    display: grid;
    place-items: start center;
    padding: 112px 18px 32px;
    background: rgba(244, 251, 255, 0.62);
    backdrop-filter: blur(5px);
}

.page-loading[hidden] {
    display: none;
}

.page-loading-panel {
    width: min(100%, 620px);
    display: grid;
    gap: 14px;
    padding: 22px;
    border: 2px solid rgba(214, 225, 242, 0.92);
    border-radius: 8px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 254, 248, 0.96)),
        var(--panel);
    box-shadow: var(--shadow);
}

.skeleton-line,
.skeleton-grid span {
    overflow: hidden;
    border-radius: 8px;
    background:
        linear-gradient(90deg, #e5edf8 0%, #f7fbff 42%, #e5edf8 84%);
    background-size: 220% 100%;
    animation: pageSkeletonShimmer 1100ms ease-in-out infinite;
}

.skeleton-line {
    height: 16px;
}

.skeleton-title {
    width: min(74%, 360px);
    height: 34px;
}

.skeleton-short {
    width: min(44%, 230px);
}

.skeleton-mid {
    width: min(62%, 330px);
}

.skeleton-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin: 6px 0;
}

.skeleton-grid span {
    height: 82px;
}

body.is-page-loading .page {
    opacity: 0.38;
}

.login-grid {
    min-height: calc(100vh - 128px);
    display: grid;
    grid-template-columns: minmax(280px, 440px) 1fr;
    align-items: center;
    gap: clamp(24px, 6vw, 72px);
}

.login-panel,
.panel,
.hero-panel,
.stat-card,
.subject-card,
.topic-card,
.reward-card,
.rank-tile {
    border: 2px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.login-panel {
    padding: 32px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(255, 254, 248, 0.96)),
        var(--panel);
}

.account-panel {
    min-width: 0;
}

.eyebrow {
    margin: 0 0 10px;
    color: var(--purple);
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
}

h1,
h2,
p {
    margin-top: 0;
}

h1 {
    margin-bottom: 18px;
    font-size: 2rem;
    line-height: 1.12;
}

h2 {
    margin-bottom: 14px;
    font-size: 1.05rem;
}

.login-form {
    display: grid;
    gap: 10px;
}

label {
    color: var(--ink);
    font-weight: 800;
}

input {
    width: 100%;
    min-height: 48px;
    padding: 11px 13px;
    border: 2px solid #cbd8ee;
    border-radius: 8px;
    background: #fff;
    color: var(--ink);
    box-shadow: inset 0 2px 0 rgba(23, 32, 51, 0.03);
}

select {
    width: 100%;
    min-height: 44px;
    padding: 10px 12px;
    border: 2px solid #cbd8ee;
    border-radius: 8px;
    background: #fff;
    color: var(--ink);
}

input:focus,
select:focus {
    outline: 4px solid rgba(54, 124, 246, 0.16);
    border-color: var(--blue);
}

.form-error {
    margin: 0;
    color: var(--danger);
    font-weight: 700;
}

.form-success {
    margin: 0;
    color: var(--success);
    font-weight: 700;
}

.answer-feedback {
    display: grid;
    gap: 6px;
    padding: 14px;
    border-radius: 8px;
    font-weight: 800;
}

.answer-feedback-title {
    font-size: 1rem;
}

.answer-feedback-line {
    margin: 0;
    color: inherit;
    font-weight: 700;
}

.answer-feedback-line span,
.answer-feedback small {
    display: block;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
}

.answer-feedback.success {
    border: 1px solid rgba(47, 125, 69, 0.25);
    background: rgba(47, 125, 69, 0.12);
    color: var(--green);
    animation: answerSuccess 520ms ease both;
}

.answer-feedback.failed,
.answer-feedback.fail {
    border: 1px solid rgba(179, 58, 58, 0.25);
    background: rgba(179, 58, 58, 0.10);
    color: var(--danger);
    animation: answerFail 460ms ease both;
}

.answer-spark {
    position: fixed;
    z-index: 70;
    left: var(--spark-left);
    top: var(--spark-top);
    color: var(--gold);
    font-weight: 900;
    pointer-events: none;
    animation: answerSpark 820ms ease-out both;
}

.auth-switch {
    margin: 16px 0 0;
    color: var(--muted);
}

.auth-switch a {
    color: var(--teal);
    font-weight: 800;
}

.button {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 14px;
    border: 1px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 800;
    box-shadow: 0 5px 0 rgba(23, 32, 51, 0.14);
    transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease, color 140ms ease;
}

.button.primary {
    background: var(--blue);
    color: #fff;
}

.button.primary:hover {
    background: #286bea;
    transform: translateY(-1px);
    box-shadow: 0 6px 0 rgba(23, 32, 51, 0.16);
}

.button.ghost {
    background: #fff;
    border-color: #cbd8ee;
    color: var(--ink);
}

.button.ghost:hover {
    background: #fff2c2;
    border-color: var(--gold);
    transform: translateY(-1px);
}

.button.wide {
    width: 100%;
}

.math-board {
    min-height: 420px;
    display: grid;
    align-content: center;
    gap: 16px;
    padding: 28px;
    border-radius: 8px;
    background:
        linear-gradient(90deg, rgba(54, 124, 246, 0.10) 1px, transparent 1px),
        linear-gradient(rgba(54, 124, 246, 0.10) 1px, transparent 1px),
        linear-gradient(135deg, #fff7c7, #e5f7ff);
    background-size: 34px 34px;
    border: 2px solid #cbd8ee;
    box-shadow: var(--shadow);
}

.board-row {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 18px 20px;
    border: 2px solid rgba(23, 32, 51, 0.10);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.90);
    font-size: 1.2rem;
    box-shadow: var(--soft-shadow);
}

.login-landing {
    grid-template-columns: minmax(300px, 430px) minmax(420px, 1fr);
    gap: clamp(28px, 7vw, 86px);
}

.login-card {
    position: relative;
    overflow: hidden;
    padding: clamp(24px, 4vw, 38px);
    border-color: rgba(54, 124, 246, 0.20);
    background:
        radial-gradient(circle at 88% 10%, rgba(245, 184, 46, 0.20) 0 18%, transparent 19%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 254, 248, 0.98)),
        var(--panel);
}

.login-card::after {
    content: "";
    position: absolute;
    right: -22px;
    bottom: -24px;
    width: 120px;
    height: 120px;
    border: 18px solid rgba(15, 143, 140, 0.10);
    border-radius: 50%;
    pointer-events: none;
}

.login-card-header {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
}

.login-card-header h1 {
    margin-bottom: 0;
    font-size: clamp(2rem, 4vw, 2.8rem);
}

.login-badge {
    display: inline-grid;
    place-items: center;
    width: 58px;
    height: 58px;
    flex: 0 0 auto;
    border: 3px solid rgba(255, 255, 255, 0.88);
    border-radius: 8px;
    background:
        linear-gradient(135deg, var(--gold), #fff176 48%, var(--coral));
    color: var(--ink);
    font-size: 1.08rem;
    font-weight: 900;
    box-shadow: 0 7px 0 rgba(23, 32, 51, 0.14);
    transform: rotate(-3deg);
}

.login-card .login-form {
    position: relative;
    z-index: 1;
    gap: 14px;
}

.input-group {
    display: grid;
    gap: 7px;
}

.login-card input {
    min-height: 52px;
    border-color: #bfd0ea;
    background:
        linear-gradient(180deg, #ffffff, #fbfdff);
}

.login-card .button.primary {
    min-height: 48px;
    margin-top: 2px;
    background: var(--ink);
}

.login-card .button.primary:hover {
    background: var(--teal);
}

.login-card .auth-switch {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 18px;
    font-weight: 700;
}

.login-card .auth-switch a {
    color: var(--blue);
    font-weight: 900;
}

.login-showcase {
    position: relative;
    min-height: 500px;
    overflow: hidden;
    border: 2px solid rgba(54, 124, 246, 0.18);
    border-radius: 8px;
    background:
        radial-gradient(circle at 74% 22%, rgba(242, 99, 76, 0.18) 0 12%, transparent 13%),
        radial-gradient(circle at 20% 74%, rgba(15, 143, 140, 0.18) 0 15%, transparent 16%),
        linear-gradient(90deg, rgba(54, 124, 246, 0.10) 1px, transparent 1px),
        linear-gradient(rgba(54, 124, 246, 0.10) 1px, transparent 1px),
        linear-gradient(135deg, #fff7c7, #e8fbff 58%, #f1fff2);
    background-size: auto, auto, 34px 34px, 34px 34px, auto;
    box-shadow: var(--shadow);
    isolation: isolate;
}

.login-showcase::before {
    content: "";
    position: absolute;
    inset: 22px;
    z-index: 0;
    border-radius: 50%;
    background:
        repeating-conic-gradient(
            from -18deg,
            rgba(255, 255, 255, 0.56) 0 9deg,
            transparent 9deg 22deg
        );
    opacity: 0.76;
    animation: loginGlowSpin 12s linear infinite;
}

.lesson-card {
    position: absolute;
    right: clamp(20px, 5vw, 58px);
    top: 46px;
    z-index: 2;
    width: min(55%, 300px);
    min-width: 230px;
    padding: 18px;
    border: 2px solid rgba(23, 32, 51, 0.10);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.90);
    box-shadow: 0 10px 0 rgba(23, 32, 51, 0.10), 0 16px 32px rgba(23, 32, 51, 0.10);
    transform: rotate(3deg);
}

.lesson-chip {
    display: inline-flex;
    min-height: 28px;
    align-items: center;
    padding: 4px 9px;
    border-radius: 999px;
    background: rgba(54, 124, 246, 0.12);
    color: var(--blue);
    font-size: 0.76rem;
    font-weight: 900;
}

.lesson-equation {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 16px;
    margin-top: 22px;
}

.lesson-equation span {
    color: var(--muted);
    font-size: 1.35rem;
    font-weight: 900;
}

.lesson-equation strong {
    color: var(--ink);
    font-size: clamp(2.6rem, 7vw, 4.7rem);
    line-height: 0.88;
}

.lesson-progress {
    height: 10px;
    margin-top: 22px;
    overflow: hidden;
    border-radius: 999px;
    background: #dfe8f7;
}

.lesson-progress span {
    display: block;
    width: 78%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--green), var(--gold), var(--coral));
}

.login-mascot {
    position: absolute;
    left: clamp(22px, 5vw, 62px);
    bottom: 28px;
    z-index: 2;
    width: 240px;
    height: 292px;
    filter: drop-shadow(0 12px 0 rgba(23, 32, 51, 0.10));
    animation: loginMascotFloat 2800ms ease-in-out infinite;
}

.login-mascot-ear {
    position: absolute;
    top: 12px;
    width: 72px;
    height: 82px;
    border: 4px solid rgba(255, 255, 255, 0.86);
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.20), transparent 52%),
        var(--blue);
    box-shadow: inset -8px -8px 0 rgba(23, 32, 51, 0.08);
}

.login-mascot-ear.left {
    left: 34px;
    border-radius: 42px 42px 26px 42px;
    transform: rotate(-28deg);
}

.login-mascot-ear.right {
    right: 34px;
    border-radius: 42px 42px 42px 26px;
    transform: rotate(28deg);
}

.login-mascot-head {
    position: absolute;
    top: 58px;
    left: 32px;
    width: 176px;
    height: 160px;
    overflow: hidden;
    border: 5px solid rgba(255, 255, 255, 0.9);
    border-radius: 48% 48% 44% 44%;
    background:
        radial-gradient(circle at 30% 18%, rgba(255, 255, 255, 0.64) 0 11%, transparent 12%),
        linear-gradient(145deg, #91eee7, var(--teal) 62%);
    box-shadow: inset -14px -16px 0 rgba(23, 32, 51, 0.10);
}

.login-mascot-head::before {
    content: "";
    position: absolute;
    left: 29px;
    top: 53px;
    width: 116px;
    height: 82px;
    border-radius: 50% 50% 45% 45%;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: inset -7px -8px 0 rgba(23, 32, 51, 0.06);
}

.login-mascot-eye {
    position: absolute;
    z-index: 3;
    top: 88px;
    width: 13px;
    height: 18px;
    border-radius: 50%;
    background: var(--ink);
    box-shadow: inset 3px 3px 0 rgba(255, 255, 255, 0.42);
}

.login-mascot-eye.left {
    left: 82px;
}

.login-mascot-eye.right {
    right: 82px;
}

.login-mascot-cheek {
    position: absolute;
    z-index: 3;
    top: 113px;
    width: 22px;
    height: 12px;
    border-radius: 999px;
    background: rgba(242, 99, 76, 0.48);
}

.login-mascot-cheek.left {
    left: 55px;
}

.login-mascot-cheek.right {
    right: 55px;
}

.login-mascot-smile {
    position: absolute;
    z-index: 3;
    left: 50%;
    top: 115px;
    width: 34px;
    height: 20px;
    border-bottom: 4px solid var(--ink);
    border-radius: 0 0 999px 999px;
    transform: translateX(-50%);
}

.login-mascot-smile::before {
    content: "";
    position: absolute;
    top: -10px;
    left: 50%;
    width: 12px;
    height: 10px;
    border-radius: 50%;
    background: var(--coral);
    transform: translateX(-50%);
}

.login-mascot-body {
    position: absolute;
    left: 60px;
    bottom: 28px;
    width: 120px;
    height: 86px;
    border: 4px solid rgba(255, 255, 255, 0.82);
    border-radius: 50px 50px 26px 26px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.22), transparent 48%),
        var(--purple);
    box-shadow: inset -10px -12px 0 rgba(23, 32, 51, 0.10);
}

.login-mascot-body::before {
    content: "";
    position: absolute;
    left: 50%;
    top: -15px;
    width: 28px;
    height: 28px;
    border: 4px solid rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    background: var(--gold);
    box-shadow: inset -4px -5px 0 rgba(128, 79, 19, 0.14);
    transform: translateX(-50%);
}

.login-mascot-arm {
    position: absolute;
    top: 178px;
    width: 66px;
    height: 20px;
    border-radius: 999px;
    background: var(--purple);
    box-shadow: 0 5px 0 rgba(23, 32, 51, 0.12);
}

.login-mascot-arm.left {
    left: 12px;
    transform: rotate(-22deg);
}

.login-mascot-arm.right {
    right: 12px;
    transform: rotate(22deg);
}

.login-mascot-foot {
    position: absolute;
    bottom: 22px;
    width: 54px;
    height: 28px;
    border: 4px solid rgba(255, 255, 255, 0.8);
    border-radius: 999px;
    background: var(--blue);
}

.login-mascot-foot.left {
    left: 46px;
    transform: rotate(8deg);
}

.login-mascot-foot.right {
    right: 46px;
    transform: rotate(-8deg);
}

.floating-token {
    position: absolute;
    z-index: 3;
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    border: 3px solid rgba(255, 255, 255, 0.88);
    border-radius: 8px;
    font-weight: 900;
    box-shadow: 0 7px 0 rgba(23, 32, 51, 0.12);
}

.token-one {
    left: 34px;
    top: 48px;
    background: var(--coral);
    color: #ffffff;
    transform: rotate(-10deg);
}

.token-two {
    right: 36px;
    bottom: 72px;
    background: var(--gold);
    color: var(--ink);
    transform: rotate(9deg);
}

.token-three {
    left: 46%;
    bottom: 26px;
    background: var(--green);
    color: #ffffff;
    transform: rotate(-6deg);
}

@keyframes loginMascotFloat {
    0%,
    100% {
        transform: translateY(0) rotate(-2deg);
    }

    50% {
        transform: translateY(-8px) rotate(2deg);
    }
}

@keyframes loginGlowSpin {
    from {
        transform: rotate(0);
    }

    to {
        transform: rotate(360deg);
    }
}

@keyframes pageSkeletonShimmer {
    0% {
        background-position: 120% 0;
    }

    100% {
        background-position: -120% 0;
    }
}

.hero-panel,
.page-heading {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 20px;
    overflow: hidden;
}

.hero-panel {
    padding: 26px;
    position: relative;
    overflow: hidden;
    border-color: rgba(54, 124, 246, 0.18);
}

.hero-panel::after {
    content: "";
    position: absolute;
    right: 18px;
    bottom: 14px;
    width: 94px;
    height: 30px;
    opacity: 0.34;
    background:
        linear-gradient(90deg, var(--gold) 0 22px, transparent 22px 30px, var(--coral) 30px 52px, transparent 52px 60px, var(--teal) 60px 82px);
    border-radius: 8px;
    transform: rotate(-3deg);
    pointer-events: none;
}

.world-teal {
    background:
        linear-gradient(135deg, rgba(15, 143, 140, 0.18), rgba(255, 255, 255, 0.92) 42%),
        var(--panel);
}

.world-green {
    background:
        linear-gradient(135deg, rgba(53, 166, 91, 0.18), rgba(255, 255, 255, 0.92) 42%),
        var(--panel);
}

.world-gold {
    background:
        linear-gradient(135deg, rgba(245, 184, 46, 0.22), rgba(255, 255, 255, 0.92) 42%),
        var(--panel);
}

.world-coral {
    background:
        linear-gradient(135deg, rgba(242, 99, 76, 0.18), rgba(255, 255, 255, 0.92) 42%),
        var(--panel);
}

.world-purple {
    background:
        linear-gradient(135deg, rgba(118, 87, 232, 0.18), rgba(255, 255, 255, 0.92) 42%),
        var(--panel);
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 22px;
}

.stat-card {
    padding: 18px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(255, 254, 248, 0.98)),
        var(--panel);
    transition: transform 160ms ease, box-shadow 160ms ease;
}

.stat-card:hover,
.subject-card:hover,
.topic-card:hover,
.friend-card:hover,
.reward-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 22px 48px rgba(23, 32, 51, 0.14);
}

.stat-card:nth-child(4n+1) {
    border-top: 5px solid var(--blue);
}

.stat-card:nth-child(4n+2) {
    border-top: 5px solid var(--green);
}

.stat-card:nth-child(4n+3) {
    border-top: 5px solid var(--gold);
}

.stat-card:nth-child(4n+4) {
    border-top: 5px solid var(--coral);
}

.stat-card span,
.rank-tile span {
    display: block;
    color: var(--muted);
    font-size: 0.88rem;
    font-weight: 700;
}

.stat-card strong {
    display: block;
    margin-top: 8px;
    font-size: 1.8rem;
    color: var(--ink);
}

.dashboard-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(300px, 360px);
    gap: 18px;
    align-items: start;
}

.dashboard-main,
.dashboard-sidebar {
    display: grid;
    gap: 18px;
}

.dashboard-panel {
    padding: 18px;
}

.quest-grid {
    display: grid;
    gap: 10px;
}

.quest-card {
    display: grid;
    grid-template-columns: 6px minmax(0, 1fr) auto;
    gap: 8px 12px;
    align-items: center;
    padding: 12px;
    border: 2px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: var(--soft-shadow);
}

.quest-card::before {
    content: "";
    align-self: stretch;
    width: 6px;
    border-radius: 999px;
    background: var(--gold);
    grid-row: 1 / 3;
}

.quest-card > div:first-child {
    grid-column: 2;
}

.quest-card > span {
    grid-column: 3;
}

.quest-card small,
.quest-card span {
    color: var(--muted);
}

.quest-card .meter {
    grid-column: 2 / -1;
}

.quest-card.complete {
    border-color: rgba(53, 166, 91, 0.34);
    background: #efffed;
}

.quest-card.complete::before {
    background: var(--green);
}

.subject-list,
.topic-list {
    display: grid;
}

.subject-row,
.topic-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(210px, 0.48fr);
    gap: 16px;
    align-items: center;
    padding: 14px 0 14px 12px;
    border-left: 6px solid var(--teal);
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.62);
    border-radius: 8px;
    margin-bottom: 8px;
}

.subject-row:first-child,
.topic-row:first-child {
    padding-top: 0;
}

.subject-row:last-child,
.topic-row:last-child {
    padding-bottom: 0;
    border-bottom: 0;
}

.subject-row.accent-coral,
.topic-row.accent-coral {
    border-left-color: var(--coral);
}

.subject-row.accent-gold,
.topic-row.accent-gold {
    border-left-color: var(--gold);
}

.subject-row.accent-green,
.topic-row.accent-green {
    border-left-color: var(--green);
}

.subject-row.accent-purple,
.topic-row.accent-purple {
    border-left-color: var(--purple);
}

.subject-row-title,
.topic-row > div:first-child {
    display: grid;
    gap: 4px;
}

.subject-row-title small,
.topic-row small,
.topic-row-progress span {
    color: var(--muted);
}

.subject-row-progress {
    display: grid;
    gap: 8px;
}

.subject-row-progress > div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.subject-start {
    color: var(--teal);
    font-size: 0.82rem;
    font-weight: 800;
}

.topic-row-progress {
    display: grid;
    grid-template-columns: auto minmax(110px, 1fr) 48px;
    gap: 10px;
    align-items: center;
}

.topic-row-progress strong {
    text-align: right;
}

.subject-section {
    margin-bottom: 22px;
}

.subject-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.subject-grid.full {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.subject-card {
    min-height: 182px;
    display: grid;
    gap: 10px;
    align-content: start;
    padding: 18px;
    border-top: 7px solid var(--teal);
    background:
        linear-gradient(180deg, #ffffff, #fffef8),
        var(--panel);
    transition: transform 160ms ease, box-shadow 160ms ease;
}

.subject-card.accent-coral {
    border-top-color: var(--coral);
    background: linear-gradient(180deg, rgba(242, 99, 76, 0.08), #fffef8 42%);
}

.subject-card.accent-gold {
    border-top-color: var(--gold);
    background: linear-gradient(180deg, rgba(245, 184, 46, 0.14), #fffef8 42%);
}

.subject-card.accent-green {
    border-top-color: var(--green);
    background: linear-gradient(180deg, rgba(53, 166, 91, 0.10), #fffef8 42%);
}

.subject-card.accent-purple {
    border-top-color: var(--purple);
    background: linear-gradient(180deg, rgba(118, 87, 232, 0.10), #fffef8 42%);
}

.subject-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.subject-card-header > strong {
    display: inline-grid;
    place-items: center;
    min-width: 42px;
    height: 34px;
    padding: 0 9px;
    border-radius: 8px;
    background: var(--ink);
    color: #fff;
    box-shadow: 0 5px 0 rgba(23, 32, 51, 0.14);
}

.subject-card h2,
.subject-card h3 {
    margin: 0;
    font-size: 1.24rem;
}

.subject-card p,
.subject-card small {
    color: var(--muted);
}

.subject-metrics {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: 4px;
}

.subject-metrics strong {
    font-size: 1.35rem;
}

.subject-rating {
    min-height: 28px;
    display: inline-flex;
    align-items: center;
    padding: 5px 9px;
    border-radius: 999px;
    font-size: 0.76rem;
    font-weight: 800;
    border: 1px solid rgba(23, 32, 51, 0.08);
}

.rating-none {
    background: #eef3fb;
    color: var(--muted);
}

.rating-high,
.rating-good {
    background: rgba(53, 166, 91, 0.16);
    color: var(--green);
}

.rating-mid {
    background: rgba(245, 184, 46, 0.22);
    color: #806015;
}

.rating-low {
    background: rgba(207, 63, 78, 0.13);
    color: var(--danger);
}

.subject-status {
    min-height: 28px;
    display: inline-flex;
    align-items: center;
    padding: 5px 9px;
    border-radius: 999px;
    background: rgba(53, 166, 91, 0.16);
    color: var(--green);
    font-size: 0.76rem;
    font-weight: 800;
}

.account-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 0.82fr);
    gap: 22px;
    align-items: center;
    margin-bottom: 20px;
    padding: 22px;
    background:
        linear-gradient(135deg, rgba(118, 87, 232, 0.12), rgba(255, 255, 255, 0.92) 42%),
        linear-gradient(180deg, #ffffff, #fffef8),
        var(--panel);
}

.account-identity {
    display: flex;
    align-items: center;
    gap: 18px;
    min-width: 0;
}

.account-identity h1 {
    margin-bottom: 6px;
}

.account-identity p:last-child {
    margin: 0;
    color: var(--muted);
    font-weight: 800;
}

.account-hero-avatar {
    width: 92px;
    height: 92px;
    flex: 0 0 auto;
    border: 3px solid #ffffff;
    border-radius: 18px;
    background: #ffffff;
    object-fit: cover;
    box-shadow: 0 10px 0 rgba(23, 32, 51, 0.12), 0 16px 30px rgba(23, 32, 51, 0.12);
}

.account-hero-initial {
    display: inline-grid;
    place-items: center;
    background:
        linear-gradient(135deg, var(--gold), #fff176 54%, var(--coral));
    color: var(--ink);
    font-size: 2.2rem;
    font-weight: 900;
}

.account-summary {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.account-summary span {
    min-width: 0;
    padding: 12px;
    border: 2px solid rgba(214, 225, 242, 0.88);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.72);
}

.account-summary strong,
.account-summary small {
    display: block;
}

.account-summary small {
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 800;
}

.account-section-heading {
    margin-bottom: 12px;
}

.account-layout {
    display: grid;
    grid-template-columns: minmax(260px, 340px) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
}

.account-main {
    display: grid;
    gap: 18px;
}

.account-panel {
    padding: 20px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(255, 254, 248, 0.97)),
        var(--panel);
}

.account-avatar-panel {
    position: sticky;
    top: 94px;
}

.profile-avatar-current {
    display: grid;
    gap: 12px;
    justify-items: center;
    margin-bottom: 18px;
    text-align: center;
}

.profile-avatar-current strong,
.profile-avatar-current small {
    display: block;
}

.profile-avatar-current small {
    color: var(--muted);
}

.profile-avatar-image {
    width: 132px;
    height: 132px;
    flex: 0 0 auto;
    border: 2px solid var(--line);
    border-radius: 18px;
    background: #ffffff;
    object-fit: cover;
    box-shadow: 0 10px 0 rgba(23, 32, 51, 0.10);
}

.profile-avatar-initial {
    display: inline-grid;
    place-items: center;
    background: var(--gold);
    color: var(--ink);
    font-size: 1.6rem;
    font-weight: 900;
}

.avatar-upload-form {
    display: grid;
    gap: 10px;
}

.account-form {
    display: grid;
    gap: 14px;
}

.account-form .button {
    justify-self: start;
}

.account-field-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.account-field-grid > div {
    display: grid;
    gap: 8px;
}

.account-field-grid > div:last-child:nth-child(odd) {
    grid-column: 1 / -1;
}

.friend-search-panel {
    margin-bottom: 22px;
}

.friend-search-form {
    display: grid;
    gap: 10px;
}

.friend-search-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
}

.friend-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.friend-card {
    display: grid;
    gap: 16px;
    padding: 18px;
    border: 2px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
    box-shadow: var(--shadow);
    transition: transform 160ms ease, box-shadow 160ms ease;
}

.friend-card-header {
    display: block;
}

.friend-card h2 {
    margin: 0 0 4px;
}

.friend-card small,
.friend-metrics,
.friend-reward-item small {
    color: var(--muted);
}

.friend-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.friend-metrics span {
    min-width: 0;
    padding: 10px;
    border-radius: 8px;
    background: #f4f9ff;
    font-size: 0.78rem;
    font-weight: 800;
}

.friend-metrics strong {
    display: block;
    margin-bottom: 2px;
    color: var(--ink);
    font-size: 1.08rem;
}

.friend-profile-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
    gap: 18px;
    align-items: start;
}

.friend-reward-list {
    display: grid;
    gap: 10px;
}

.friend-reward-item {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    padding: 12px;
    border: 2px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
}

.friend-reward-item strong,
.friend-reward-item small {
    display: block;
}

.empty-state {
    padding: 24px;
}

.table-link {
    color: var(--blue);
    font-weight: 800;
}

.page-message {
    width: min(720px, 100%);
}

.two-column {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
    gap: 18px;
    margin-bottom: 22px;
}

.practice-layout {
    display: grid;
    grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
}

.practice-settings,
.practice-panel {
    padding: 18px;
}

.practice-settings-form,
.practice-answer-form {
    display: grid;
    gap: 10px;
}

.practice-panel {
    display: grid;
    gap: 16px;
}

.practice-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.practice-meta span,
.badge-unlocks span {
    min-height: 28px;
    display: inline-flex;
    align-items: center;
    padding: 5px 9px;
    border-radius: 999px;
    background: #ece7dc;
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 800;
}

.practice-question {
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fbfaf6;
}

.practice-question small {
    color: var(--muted);
    font-weight: 800;
}

.practice-question h2 {
    margin: 10px 0 0;
    font-size: 1.6rem;
    line-height: 1.18;
}

.practice-answer-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
}

.practice-choices {
    display: grid;
    gap: 10px;
    margin: 0;
    padding: 0;
    border: 0;
}

.practice-choices legend {
    margin-bottom: 2px;
    font-weight: 800;
}

.practice-choice {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 10px;
    align-items: center;
    padding: 12px 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    cursor: pointer;
}

.practice-choice:has(input:checked) {
    border-color: var(--green);
    background: rgba(47, 125, 69, 0.08);
}

.practice-choice input {
    margin: 0;
}

.practice-choice span {
    line-height: 1.35;
}

.badge-unlocks {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.badge-unlocks span {
    background: rgba(47, 125, 69, 0.12);
    color: var(--green);
}

.badge-unlocks strong {
    margin-right: 4px;
}

.section-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 12px;
}

.section-heading h2 {
    margin: 0;
}

.section-heading span,
.section-heading a,
.muted {
    color: var(--muted);
}

.section-heading.compact {
    margin-bottom: 16px;
}

.topic-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.topic-card {
    min-height: 174px;
    display: grid;
    gap: 8px;
    align-content: start;
    padding: 18px;
    border-top: 7px solid var(--teal);
    background:
        linear-gradient(180deg, rgba(54, 124, 246, 0.07), rgba(255, 254, 248, 0.98) 46%),
        var(--panel);
    transition: transform 160ms ease, box-shadow 160ms ease;
}

.topic-card span,
.topic-card small {
    color: var(--muted);
}

.topic-card strong {
    font-size: 1.22rem;
}

.accent-coral {
    border-top-color: var(--coral);
}

.accent-gold {
    border-top-color: var(--gold);
}

.accent-green {
    border-top-color: var(--green);
}

.accent-purple {
    border-top-color: var(--purple);
}

.panel {
    padding: 20px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(255, 254, 248, 0.96)),
        var(--panel);
}

.reward-preview {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 14px;
}

.reward-preview > div {
    min-width: 0;
}

.reward-preview p {
    margin: 4px 0 0;
    color: var(--muted);
}

.reward-art {
    --reward-accent: var(--gold);
    --reward-deep: var(--blue);
    --reward-light: #ffe88f;
    --reward-bg: #fff5c7;
    --reward-shadow: rgba(23, 32, 51, 0.18);
    --reward-ink: #172033;
    --reward-glow-duration: 9s;
    --reward-glow-delay: 0ms;
    --reward-shine-duration: 3200ms;
    --reward-shine-delay: 0ms;
    --reward-sparkle-duration: 2300ms;
    --reward-sparkle-one-delay: 0ms;
    --reward-sparkle-two-delay: 420ms;
    --reward-sparkle-three-delay: 780ms;
    --reward-mascot-animation: rewardMascotBob;
    --reward-bob-duration: 2400ms;
    --reward-bob-delay: 0ms;
    --reward-ear-duration: var(--reward-bob-duration);
    --reward-ear-delay: var(--reward-bob-delay);
    --reward-arm-duration: var(--reward-bob-duration);
    --reward-arm-delay: var(--reward-bob-delay);
    --reward-bow-duration: var(--reward-bob-duration);
    --reward-bow-delay: var(--reward-bob-delay);
    --reward-charm-duration: 1600ms;
    --reward-charm-delay: 0ms;
    --reward-token-duration: 2600ms;
    --reward-token-delay: 0ms;
    position: relative;
    display: inline-grid;
    place-items: center;
    width: 94px;
    height: 94px;
    flex: 0 0 auto;
    overflow: hidden;
    border: 3px solid var(--reward-ink);
    border-radius: 8px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.92), transparent 38%),
        radial-gradient(circle at 78% 18%, rgba(255, 122, 162, 0.28) 0 5%, transparent 6%),
        radial-gradient(circle at 19% 70%, rgba(73, 196, 181, 0.24) 0 5%, transparent 6%),
        radial-gradient(circle at 76% 66%, rgba(99, 125, 255, 0.18) 0 4%, transparent 5%),
        radial-gradient(circle at 28% 24%, rgba(255, 255, 255, 0.96) 0 13%, transparent 14%),
        radial-gradient(circle at 70% 76%, rgba(245, 184, 46, 0.18) 0 24%, transparent 25%),
        linear-gradient(135deg, var(--reward-bg), #ffffff 64%),
        #ffffff;
    box-shadow:
        inset 0 0 0 2px rgba(255, 255, 255, 0.92),
        0 9px 0 rgba(23, 32, 51, 0.22),
        0 12px 28px rgba(23, 32, 51, 0.10);
    isolation: isolate;
    transition: transform 160ms ease, box-shadow 160ms ease;
}

.reward-art::before {
    content: "";
    position: absolute;
    inset: 8px;
    z-index: 0;
    border-radius: 50%;
    background:
        repeating-conic-gradient(
            from -18deg,
            rgba(255, 255, 255, 0.82) 0 9deg,
            transparent 9deg 20deg
        );
    opacity: 0.95;
    transform: rotate(-8deg);
    animation: rewardGlowSpin var(--reward-glow-duration) linear var(--reward-glow-delay) infinite;
}

.reward-manga-tone {
    position: absolute;
    inset: 0;
    z-index: 0;
    background-image: radial-gradient(circle, rgba(23, 32, 51, 0.16) 0 1px, transparent 1.35px);
    background-position: 1px 1px;
    background-size: 7px 7px;
    opacity: 0.42;
    -webkit-mask-image: radial-gradient(circle at 58% 45%, #000 0 62%, transparent 76%);
    mask-image: radial-gradient(circle at 58% 45%, #000 0 62%, transparent 76%);
}

.reward-manga-burst {
    position: absolute;
    inset: 7px;
    z-index: 1;
    border-radius: 50%;
    background:
        repeating-conic-gradient(
            from -10deg,
            rgba(23, 32, 51, 0.24) 0 2deg,
            transparent 2deg 13deg
        );
    opacity: 0.62;
    transform: rotate(-8deg);
    animation: rewardMangaBurst var(--reward-glow-duration) steps(10) var(--reward-glow-delay) infinite;
}

.reward-art::after {
    content: "";
    position: absolute;
    top: 10px;
    left: -16px;
    z-index: 1;
    width: 78px;
    height: 18px;
    border-radius: 999px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.72), transparent);
    opacity: 0.78;
    transform: rotate(-34deg);
    animation: rewardShineSweep var(--reward-shine-duration) ease-in-out var(--reward-shine-delay) infinite;
}

.reward-manga-speed {
    position: absolute;
    z-index: 1;
    height: 3px;
    border-radius: 999px;
    background: var(--reward-ink);
    box-shadow: 0 2px 0 rgba(255, 255, 255, 0.82);
    opacity: 0.5;
    transform-origin: center;
    animation: rewardMangaSpeed 1800ms ease-in-out infinite;
}

.reward-manga-speed::before,
.reward-manga-speed::after {
    content: "";
    position: absolute;
    top: 6px;
    left: 12px;
    height: 2px;
    border-radius: inherit;
    background: inherit;
}

.reward-manga-speed::before {
    width: 18px;
}

.reward-manga-speed::after {
    top: -6px;
    left: 22px;
    width: 12px;
}

.reward-manga-speed-one {
    top: 22px;
    left: -15px;
    width: 42px;
    transform: rotate(-24deg);
}

.reward-manga-speed-two {
    right: -18px;
    bottom: 31px;
    width: 46px;
    transform: rotate(-22deg);
    animation-delay: 360ms;
}

.reward-manga-speed-three {
    top: 55px;
    left: -22px;
    width: 32px;
    transform: rotate(18deg);
    animation-delay: 720ms;
}

.reward-sparkle {
    --reward-sparkle-rest: 0.82;
    --reward-sparkle-pop: 1.18;
    position: absolute;
    z-index: 3;
    width: 11px;
    height: 11px;
    background: #ffffff;
    clip-path: polygon(50% 0, 62% 36%, 100% 50%, 62% 64%, 50% 100%, 38% 64%, 0 50%, 38% 36%);
    filter:
        drop-shadow(1px 0 0 var(--reward-ink))
        drop-shadow(-1px 0 0 var(--reward-ink))
        drop-shadow(0 2px 0 rgba(23, 32, 51, 0.18));
    animation: rewardSparklePop var(--reward-sparkle-duration) ease-in-out var(--reward-sparkle-delay, 0ms) infinite;
}

.reward-sparkle-one {
    --reward-sparkle-delay: var(--reward-sparkle-one-delay);
    top: 14px;
    right: 18px;
    background: #fff176;
}

.reward-sparkle-two {
    --reward-sparkle-delay: var(--reward-sparkle-two-delay);
    bottom: 22px;
    left: 13px;
    width: 8px;
    height: 8px;
    background: #ff8fb8;
}

.reward-sparkle-three {
    --reward-sparkle-delay: var(--reward-sparkle-three-delay);
    top: 24px;
    left: 17px;
    width: 7px;
    height: 7px;
    background: #7ee3dc;
}

.reward-trophy {
    --reward-character-y: -2px;
    --reward-character-scale: 1;
    --reward-character-rotate: -3deg;
    position: relative;
    display: block;
    z-index: 2;
    width: 64px;
    height: 72px;
    filter:
        drop-shadow(1px 0 0 var(--reward-ink))
        drop-shadow(-1px 0 0 var(--reward-ink))
        drop-shadow(0 1px 0 var(--reward-ink))
        drop-shadow(0 5px 0 rgba(23, 32, 51, 0.18));
    transform: translateY(var(--reward-character-y)) scale(var(--reward-character-scale)) rotate(var(--reward-character-rotate));
    animation: var(--reward-mascot-animation) var(--reward-bob-duration) ease-in-out var(--reward-bob-delay) infinite;
}

.reward-trophy::before,
.reward-trophy::after {
    content: "";
    position: absolute;
    top: 7px;
    z-index: 0;
    width: 20px;
    height: 23px;
    border: 3px solid rgba(255, 255, 255, 0.86);
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.18), transparent 54%),
        var(--reward-deep);
    box-shadow:
        0 0 0 2px rgba(23, 32, 51, 0.62),
        inset -3px -3px 0 rgba(23, 32, 51, 0.10);
}

.reward-trophy::before {
    left: 6px;
    border-radius: 16px 16px 10px 16px;
    transform: rotate(-28deg);
    transform-origin: 70% 78%;
    animation: rewardLeftEarWiggle var(--reward-ear-duration) ease-in-out var(--reward-ear-delay) infinite;
}

.reward-trophy::after {
    right: 6px;
    border-radius: 16px 16px 16px 10px;
    transform: rotate(28deg);
    transform-origin: 30% 78%;
    animation: rewardRightEarWiggle var(--reward-ear-duration) ease-in-out var(--reward-ear-delay) infinite;
}

.reward-trophy-bow {
    position: absolute;
    top: 0;
    left: 50%;
    z-index: 4;
    width: 31px;
    height: 17px;
    transform: translateX(-50%) rotate(-5deg);
    animation: rewardBowBounce var(--reward-bow-duration) ease-in-out var(--reward-bow-delay) infinite;
}

.reward-trophy-bow::before,
.reward-trophy-bow::after {
    content: "";
    position: absolute;
    top: 3px;
    width: 14px;
    height: 11px;
    border: 2px solid rgba(255, 255, 255, 0.9);
    background:
        radial-gradient(circle at 34% 32%, rgba(255, 255, 255, 0.74) 0 18%, transparent 19%),
        var(--coral);
    box-shadow:
        0 0 0 1px rgba(23, 32, 51, 0.78),
        inset -2px -2px 0 rgba(128, 31, 44, 0.14),
        0 2px 0 rgba(23, 32, 51, 0.08);
}

.reward-trophy-bow::before {
    left: 0;
    border-radius: 10px 7px 9px 7px;
    transform: rotate(18deg);
}

.reward-trophy-bow::after {
    right: 0;
    border-radius: 7px 10px 7px 9px;
    transform: rotate(-18deg);
}

.reward-trophy-bow span {
    position: absolute;
    top: 5px;
    left: 50%;
    z-index: 1;
    width: 10px;
    height: 10px;
    border: 2px solid rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    background: #ffcf63;
    box-shadow:
        0 0 0 1px rgba(23, 32, 51, 0.78),
        inset -2px -2px 0 rgba(128, 79, 19, 0.12);
    transform: translateX(-50%);
}

.reward-trophy-arm {
    position: absolute;
    top: 41px;
    z-index: 0;
    width: 20px;
    height: 9px;
    border-radius: 999px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.28), transparent 48%),
        var(--reward-deep);
    box-shadow:
        0 0 0 2px rgba(23, 32, 51, 0.66),
        0 3px 0 rgba(23, 32, 51, 0.12);
}

.reward-trophy-arm::after {
    content: "";
    position: absolute;
    top: -5px;
    width: 12px;
    height: 12px;
    border: 2px solid rgba(255, 255, 255, 0.76);
    border-radius: 50%;
    background: #ffffff;
    box-shadow:
        0 0 0 1px rgba(23, 32, 51, 0.72),
        inset -2px -2px 0 rgba(128, 79, 19, 0.12);
}

.reward-trophy-arm-left {
    left: 1px;
    transform: rotate(-24deg);
    transform-origin: right center;
    animation: rewardLeftArmWave var(--reward-arm-duration) ease-in-out var(--reward-arm-delay) infinite;
}

.reward-trophy-arm-left::after {
    left: -8px;
}

.reward-trophy-arm-right {
    right: 1px;
    transform: rotate(24deg);
    transform-origin: left center;
    animation: rewardRightArmWave var(--reward-arm-duration) ease-in-out var(--reward-arm-delay) infinite;
}

.reward-trophy-arm-right::after {
    right: -8px;
}

.reward-trophy-cup {
    position: absolute;
    top: 13px;
    left: 8px;
    z-index: 1;
    width: 48px;
    height: 45px;
    overflow: hidden;
    border: 3px solid rgba(255, 255, 255, 0.82);
    border-radius: 21px 21px 23px 23px;
    background:
        radial-gradient(circle at 26% 18%, rgba(255, 255, 255, 0.62) 0 11%, transparent 12%),
        repeating-linear-gradient(-24deg, rgba(255, 255, 255, 0.20) 0 2px, transparent 2px 7px),
        linear-gradient(150deg, var(--reward-light) 0 23%, var(--reward-accent) 58%, var(--reward-accent) 100%);
    box-shadow:
        0 0 0 2px rgba(23, 32, 51, 0.74),
        inset -7px -8px 0 rgba(128, 79, 19, 0.13),
        inset 0 4px 0 rgba(255, 255, 255, 0.42);
}

.reward-trophy-cup::before {
    content: "";
    position: absolute;
    top: 13px;
    left: 6px;
    z-index: 0;
    width: 34px;
    height: 26px;
    border-radius: 50% 50% 45% 45%;
    background:
        radial-gradient(circle at 68% 20%, rgba(23, 32, 51, 0.08) 0 2px, transparent 2.4px),
        rgba(255, 255, 255, 0.92);
    box-shadow: inset -3px -4px 0 rgba(23, 32, 51, 0.06);
}

.reward-trophy-cup::after {
    content: "";
    position: absolute;
    top: 9px;
    right: 8px;
    z-index: 1;
    width: 8px;
    height: 5px;
    border-radius: 999px;
    background: #ffffff;
    box-shadow: 0 0 0 1px rgba(23, 32, 51, 0.24);
    transform: rotate(-24deg);
}

.reward-trophy-face {
    position: absolute;
    top: 22px;
    left: 50%;
    z-index: 2;
    width: 34px;
    height: 20px;
    transform: translateX(-50%);
}

.reward-trophy-face::before,
.reward-trophy-face::after {
    content: "";
    position: absolute;
    top: 8px;
    width: 8px;
    height: 5px;
    border-radius: 999px;
    background:
        repeating-linear-gradient(-18deg, rgba(23, 32, 51, 0.28) 0 1px, transparent 1px 3px),
        rgba(255, 122, 139, 0.68);
}

.reward-trophy-face::before {
    left: 0;
}

.reward-trophy-face::after {
    right: 0;
}

.reward-trophy-eye {
    position: absolute;
    top: 0;
    width: 8px;
    height: 10px;
    border-radius: 50%;
    background: #172033;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.78),
        0 0 0 2px rgba(23, 32, 51, 0.68),
        inset 1px 1px 0 rgba(255, 255, 255, 0.32);
}

.reward-trophy-eye::before {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 2px;
    height: 2px;
    border-radius: 50%;
    background: #ffffff;
}

.reward-trophy-eye::after {
    content: "";
    position: absolute;
    right: 1px;
    bottom: 2px;
    width: 2px;
    height: 3px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.72);
}

.reward-trophy-eye-left {
    left: 6px;
}

.reward-trophy-eye-right {
    right: 6px;
}

.reward-trophy-smile {
    position: absolute;
    left: 50%;
    bottom: -1px;
    width: 13px;
    height: 9px;
    overflow: hidden;
    border: 2px solid rgba(23, 32, 51, 0.82);
    border-top: 0;
    border-radius: 0 0 999px 999px;
    background: #ffffff;
    transform: translateX(-50%);
}

.reward-trophy-smile::before {
    content: "";
    position: absolute;
    right: 1px;
    bottom: -2px;
    left: 50%;
    width: 8px;
    height: 6px;
    border-radius: 999px 999px 0 0;
    background: var(--coral);
    transform: translateX(-50%);
}

.reward-trophy-stem {
    position: absolute;
    top: 51px;
    left: 19px;
    z-index: 2;
    width: 26px;
    height: 8px;
    border-radius: 999px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.18), rgba(23, 32, 51, 0.10)),
        var(--reward-deep);
    box-shadow:
        0 0 0 2px rgba(23, 32, 51, 0.62),
        inset 0 2px 0 rgba(255, 255, 255, 0.28);
}

.reward-trophy-base {
    position: absolute;
    left: 17px;
    bottom: 3px;
    z-index: 1;
    width: 30px;
    height: 17px;
    border-radius: 14px 14px 8px 8px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.22), transparent 48%),
        var(--reward-deep);
    box-shadow:
        0 0 0 2px rgba(23, 32, 51, 0.72),
        inset 0 3px 0 rgba(255, 255, 255, 0.22),
        0 4px 0 var(--reward-shadow);
}

.reward-trophy-base::before {
    content: "";
    position: absolute;
    left: 50%;
    top: -7px;
    width: 10px;
    height: 10px;
    border: 2px solid rgba(255, 255, 255, 0.86);
    border-radius: 50%;
    background: var(--reward-light);
    box-shadow:
        0 0 0 1px rgba(23, 32, 51, 0.74),
        inset -2px -2px 0 rgba(128, 79, 19, 0.12);
    transform: translateX(-50%);
    animation: rewardCharmBob var(--reward-charm-duration) ease-in-out var(--reward-charm-delay) infinite;
}

.reward-trophy-foot {
    position: absolute;
    bottom: 0;
    z-index: 2;
    width: 14px;
    height: 8px;
    border: 2px solid rgba(255, 255, 255, 0.78);
    border-radius: 10px 10px 7px 7px;
    background: var(--reward-deep);
    box-shadow: 0 0 0 1px rgba(23, 32, 51, 0.72);
}

.reward-trophy-foot-left {
    left: 12px;
    transform: rotate(8deg);
}

.reward-trophy-foot-right {
    right: 12px;
    transform: rotate(-8deg);
}

.reward-mark-token {
    position: absolute;
    right: 5px;
    bottom: 5px;
    z-index: 4;
    display: inline-grid;
    place-items: center;
    min-width: 34px;
    height: 34px;
    padding: 0 6px;
    border: 2px solid #ffffff;
    border-radius: 50%;
    background:
        radial-gradient(circle at 34% 28%, rgba(255, 255, 255, 0.52) 0 14%, transparent 15%),
        linear-gradient(135deg, rgba(255, 255, 255, 0.22), transparent 48%),
        var(--reward-deep);
    color: #ffffff;
    font-size: 0.7rem;
    font-weight: 900;
    box-shadow:
        0 0 0 2px rgba(23, 32, 51, 0.82),
        0 5px 12px rgba(23, 32, 51, 0.18);
    transform: rotate(5deg);
    animation: rewardTokenPulse var(--reward-token-duration) ease-in-out var(--reward-token-delay) infinite;
}

.reward-mark-token > span {
    position: relative;
    z-index: 2;
    line-height: 1;
    text-shadow: 0 1px 0 rgba(23, 32, 51, 0.2);
    transform: rotate(-5deg);
}

.reward-mark-token::before,
.reward-mark-token::after {
    content: "";
    position: absolute;
    z-index: -1;
}

.reward-mark-token::before {
    inset: -7px;
    background: #fff176;
    clip-path: polygon(50% 0, 60% 19%, 81% 10%, 80% 33%, 100% 43%, 82% 56%, 91% 78%, 68% 76%, 50% 100%, 35% 77%, 11% 82%, 19% 58%, 0 45%, 20% 33%, 18% 10%, 40% 19%);
    filter: drop-shadow(0 3px 0 rgba(23, 32, 51, 0.10));
}

.reward-mark-token::after {
    left: 50%;
    bottom: -12px;
    width: 28px;
    height: 17px;
    background: linear-gradient(90deg, var(--reward-deep) 0 43%, transparent 43% 57%, var(--reward-deep) 57%);
    clip-path: polygon(0 0, 100% 0, 88% 100%, 50% 68%, 12% 100%);
    transform: translateX(-50%) rotate(-4deg);
}

.reward-art-small {
    width: 52px;
    height: 52px;
    box-shadow:
        inset 0 0 0 2px rgba(255, 255, 255, 0.92),
        0 6px 0 rgba(23, 32, 51, 0.18),
        0 9px 18px rgba(23, 32, 51, 0.08);
}

.reward-art-small .reward-trophy {
    --reward-character-y: -4px;
    --reward-character-scale: 0.58;
    --reward-character-rotate: -4deg;
}

.reward-art-small .reward-mark-token {
    right: 2px;
    bottom: 2px;
    min-width: 24px;
    height: 24px;
    padding: 0 4px;
    font-size: 0.56rem;
}

.reward-art-small .reward-manga-tone {
    opacity: 0.26;
}

.reward-art-small .reward-manga-burst {
    inset: 5px;
}

.reward-art-small .reward-manga-speed {
    display: none;
}

.reward-art-small .reward-sparkle {
    --reward-sparkle-rest: 0.6;
    --reward-sparkle-pop: 0.85;
}

@keyframes rewardGlowSpin {
    from {
        transform: rotate(-8deg);
    }

    to {
        transform: rotate(352deg);
    }
}

@keyframes rewardMangaBurst {
    0%,
    100% {
        opacity: 0.5;
        transform: rotate(-8deg) scale(0.96);
    }

    50% {
        opacity: 0.72;
        transform: rotate(10deg) scale(1.02);
    }
}

@keyframes rewardShineSweep {
    0%,
    58%,
    100% {
        transform: translateX(-58px) rotate(-34deg);
    }

    28% {
        transform: translateX(76px) rotate(-34deg);
    }
}

@keyframes rewardMascotBob {
    0%,
    100% {
        transform: translateY(var(--reward-character-y)) scale(var(--reward-character-scale)) rotate(var(--reward-character-rotate));
    }

    45% {
        transform: translateY(calc(var(--reward-character-y) - 4px)) scale(var(--reward-character-scale)) rotate(calc(var(--reward-character-rotate) + 3deg));
    }
}

@keyframes rewardMascotHop {
    0%,
    100% {
        transform: translateY(var(--reward-character-y)) scale(var(--reward-character-scale)) rotate(var(--reward-character-rotate));
    }

    30% {
        transform: translateY(calc(var(--reward-character-y) - 7px)) scale(var(--reward-character-scale)) rotate(calc(var(--reward-character-rotate) - 2deg));
    }

    58% {
        transform: translateY(calc(var(--reward-character-y) - 1px)) scale(var(--reward-character-scale)) rotate(calc(var(--reward-character-rotate) + 4deg));
    }
}

@keyframes rewardMascotSway {
    0%,
    100% {
        transform: translateY(var(--reward-character-y)) scale(var(--reward-character-scale)) rotate(var(--reward-character-rotate));
    }

    34% {
        transform: translateY(calc(var(--reward-character-y) - 2px)) scale(var(--reward-character-scale)) rotate(calc(var(--reward-character-rotate) - 5deg));
    }

    68% {
        transform: translateY(calc(var(--reward-character-y) - 3px)) scale(var(--reward-character-scale)) rotate(calc(var(--reward-character-rotate) + 5deg));
    }
}

@keyframes rewardMascotPeek {
    0%,
    100% {
        transform: translateY(var(--reward-character-y)) scale(var(--reward-character-scale)) rotate(var(--reward-character-rotate));
    }

    22% {
        transform: translateY(calc(var(--reward-character-y) - 3px)) scale(var(--reward-character-scale)) rotate(calc(var(--reward-character-rotate) + 2deg));
    }

    46% {
        transform: translateY(calc(var(--reward-character-y) + 1px)) scale(var(--reward-character-scale)) rotate(calc(var(--reward-character-rotate) - 4deg));
    }

    72% {
        transform: translateY(calc(var(--reward-character-y) - 5px)) scale(var(--reward-character-scale)) rotate(calc(var(--reward-character-rotate) + 3deg));
    }
}

@keyframes rewardLeftEarWiggle {
    0%,
    100% {
        transform: rotate(-28deg);
    }

    42% {
        transform: rotate(-40deg);
    }

    58% {
        transform: rotate(-22deg);
    }
}

@keyframes rewardRightEarWiggle {
    0%,
    100% {
        transform: rotate(28deg);
    }

    42% {
        transform: rotate(40deg);
    }

    58% {
        transform: rotate(22deg);
    }
}

@keyframes rewardLeftArmWave {
    0%,
    100% {
        transform: rotate(-24deg);
    }

    38% {
        transform: rotate(-42deg);
    }

    62% {
        transform: rotate(-30deg);
    }
}

@keyframes rewardRightArmWave {
    0%,
    100% {
        transform: rotate(24deg);
    }

    38% {
        transform: rotate(42deg);
    }

    62% {
        transform: rotate(30deg);
    }
}

@keyframes rewardCharmBob {
    0%,
    100% {
        transform: translate(-50%, 0);
    }

    50% {
        transform: translate(-50%, -2px);
    }
}

@keyframes rewardTokenPulse {
    0%,
    100% {
        transform: rotate(5deg) scale(1);
    }

    50% {
        transform: translateY(-1px) rotate(3deg) scale(1.04);
    }
}

@keyframes rewardMangaSpeed {
    0%,
    100% {
        opacity: 0.18;
    }

    38% {
        opacity: 0.62;
    }

    56% {
        opacity: 0.34;
    }
}

@keyframes rewardSparklePop {
    0%,
    100% {
        opacity: 0.55;
        transform: scale(var(--reward-sparkle-rest)) rotate(0deg);
    }

    45% {
        opacity: 1;
        transform: scale(var(--reward-sparkle-pop)) rotate(18deg);
    }
}

@keyframes rewardBowBounce {
    0%,
    100% {
        transform: translateX(-50%) rotate(-5deg) scale(1);
    }

    45% {
        transform: translateX(-50%) translateY(-1px) rotate(2deg) scale(1.04);
    }
}

@keyframes rewardCardFloatIn {
    from {
        opacity: 0;
        filter: saturate(0.78) blur(4px);
        transform: translateY(18px);
    }

    to {
        opacity: var(--reward-card-opacity);
        filter: none;
        transform: translateY(0);
    }
}

@keyframes rewardCardPopIn {
    from {
        opacity: 0;
        filter: saturate(0.82) blur(3px);
        transform: scale(0.9) rotate(-2deg);
    }

    68% {
        opacity: var(--reward-card-opacity);
        transform: scale(1.025) rotate(1deg);
    }

    to {
        opacity: var(--reward-card-opacity);
        filter: none;
        transform: scale(1) rotate(0deg);
    }
}

@keyframes rewardCardSlideIn {
    from {
        opacity: 0;
        filter: saturate(0.78) blur(4px);
        transform: translateX(-16px) translateY(10px) rotate(-1deg);
    }

    to {
        opacity: var(--reward-card-opacity);
        filter: none;
        transform: translateX(0) translateY(0) rotate(0deg);
    }
}

@keyframes rewardCardSoftDrop {
    from {
        opacity: 0;
        filter: saturate(0.8) blur(4px);
        transform: translateY(-16px) rotate(1.5deg);
    }

    to {
        opacity: var(--reward-card-opacity);
        filter: none;
        transform: translateY(0) rotate(0deg);
    }
}

.meter {
    width: 100%;
    height: 9px;
    overflow: hidden;
    border-radius: 999px;
    background: #dfe8f7;
}

.meter span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--green), var(--gold), var(--coral));
}

.meter.large {
    height: 12px;
    margin-top: 14px;
}

.leader-list {
    display: grid;
    gap: 10px;
}

@keyframes answerSuccess {
    0% {
        transform: scale(0.92);
        box-shadow: 0 0 0 0 rgba(47, 125, 69, 0.28);
    }
    55% {
        transform: scale(1.06);
        box-shadow: 0 0 0 9px rgba(47, 125, 69, 0.12);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(47, 125, 69, 0);
    }
}

@keyframes answerFail {
    0% {
        transform: translateX(0);
        box-shadow: 0 0 0 0 rgba(179, 58, 58, 0.24);
    }
    20% {
        transform: translateX(-5px);
    }
    40% {
        transform: translateX(5px);
        box-shadow: 0 0 0 8px rgba(179, 58, 58, 0.10);
    }
    60% {
        transform: translateX(-3px);
    }
    80% {
        transform: translateX(2px);
    }
    100% {
        transform: translateX(0);
        box-shadow: 0 0 0 0 rgba(179, 58, 58, 0);
    }
}

@keyframes answerSpark {
    from {
        opacity: 0;
        transform: translate(-50%, 0) scale(0.8);
    }

    20% {
        opacity: 1;
    }

    to {
        opacity: 0;
        transform: translate(calc(-50% + var(--spark-drift)), -72px) scale(1.08);
    }
}

@media (prefers-reduced-motion: reduce) {
    .answer-feedback.success,
    .answer-feedback.failed,
    .answer-feedback.fail,
    .answer-spark,
    .skeleton-line,
    .skeleton-grid span,
    .login-showcase::before,
    .login-mascot,
    .sticker-card,
    .reward-art::before,
    .reward-art::after,
    .reward-manga-burst,
    .reward-manga-speed,
    .reward-sparkle,
    .reward-trophy,
    .reward-trophy::before,
    .reward-trophy::after,
    .reward-trophy-bow,
    .reward-trophy-arm-left,
    .reward-trophy-arm-right,
    .reward-trophy-base::before,
    .reward-mark-token {
        animation: none;
    }
}

.leader-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.leader-list li {
    display: grid;
    grid-template-columns: 46px 1fr auto;
    gap: 10px;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
}

.leader-list.compact li {
    grid-template-columns: 38px minmax(0, 1fr) auto;
}

.leader-list em {
    color: var(--muted);
    font-style: normal;
}

.leaderboard-controls,
.subject-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 14px;
}

.leaderboard-tab,
.subject-chip {
    min-height: 38px;
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    border: 2px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
    color: var(--muted);
    font-weight: 800;
    box-shadow: var(--soft-shadow);
}

.leaderboard-tab.active,
.subject-chip.active {
    border-color: var(--blue);
    background: #eaf2ff;
    color: var(--blue);
}

.page-heading {
    min-height: 96px;
}

.rank-tile {
    min-width: 150px;
    padding: 16px;
    background:
        linear-gradient(135deg, #fff4be, #ffffff 64%),
        var(--panel);
}

.rank-tile strong {
    display: block;
    margin-top: 4px;
    font-size: 1.6rem;
}

.reward-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.sticker-book {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.reward-card {
    --reward-card-opacity: 1;
    min-height: 230px;
    display: grid;
    gap: 10px;
    align-content: start;
    padding: 18px;
    background:
        linear-gradient(180deg, #ffffff, #fffef8),
        var(--panel);
    opacity: var(--reward-card-opacity);
    transition: transform 160ms ease, box-shadow 160ms ease;
}

.sticker-card {
    --reward-card-enter-animation: rewardCardFloatIn;
    --reward-card-enter-delay: 0ms;
    --reward-card-enter-duration: 560ms;
    position: relative;
    overflow: hidden;
    animation: var(--reward-card-enter-animation) var(--reward-card-enter-duration) cubic-bezier(0.2, 0.8, 0.2, 1) var(--reward-card-enter-delay) backwards;
}

.sticker-card:hover .reward-art,
.sticker-card:focus-within .reward-art {
    transform: translateY(-2px) rotate(-1deg);
    box-shadow:
        inset 0 0 0 2px rgba(255, 255, 255, 0.92),
        0 11px 0 rgba(23, 32, 51, 0.22),
        0 16px 30px rgba(23, 32, 51, 0.12);
}

.sticker-card:nth-child(1) {
    --reward-card-enter-animation: rewardCardFloatIn;
    --reward-card-enter-delay: 30ms;
}

.sticker-card:nth-child(1) .reward-art {
    --reward-mascot-animation: rewardMascotBob;
    --reward-bob-duration: 2380ms;
    --reward-bob-delay: -120ms;
    --reward-glow-duration: 9s;
    --reward-shine-duration: 3100ms;
    --reward-shine-delay: 120ms;
    --reward-sparkle-duration: 2200ms;
    --reward-sparkle-one-delay: 40ms;
    --reward-sparkle-two-delay: 480ms;
    --reward-sparkle-three-delay: 820ms;
    --reward-token-duration: 2540ms;
    --reward-token-delay: -80ms;
}

.sticker-card:nth-child(2) {
    --reward-card-enter-animation: rewardCardPopIn;
    --reward-card-enter-delay: 95ms;
}

.sticker-card:nth-child(2) .reward-art {
    --reward-mascot-animation: rewardMascotHop;
    --reward-bob-duration: 2620ms;
    --reward-bob-delay: -380ms;
    --reward-glow-duration: 10.2s;
    --reward-glow-delay: -700ms;
    --reward-shine-duration: 3600ms;
    --reward-shine-delay: 340ms;
    --reward-sparkle-duration: 2480ms;
    --reward-sparkle-one-delay: 280ms;
    --reward-sparkle-two-delay: 700ms;
    --reward-sparkle-three-delay: 1060ms;
    --reward-token-duration: 2840ms;
    --reward-token-delay: -360ms;
}

.sticker-card:nth-child(3) {
    --reward-card-enter-animation: rewardCardSlideIn;
    --reward-card-enter-delay: 155ms;
}

.sticker-card:nth-child(3) .reward-art {
    --reward-mascot-animation: rewardMascotSway;
    --reward-bob-duration: 2860ms;
    --reward-bob-delay: -680ms;
    --reward-glow-duration: 8.4s;
    --reward-glow-delay: -1300ms;
    --reward-shine-duration: 3950ms;
    --reward-shine-delay: 520ms;
    --reward-sparkle-duration: 2680ms;
    --reward-sparkle-one-delay: 180ms;
    --reward-sparkle-two-delay: 900ms;
    --reward-sparkle-three-delay: 1220ms;
    --reward-token-duration: 3060ms;
    --reward-token-delay: -620ms;
}

.sticker-card:nth-child(4) {
    --reward-card-enter-animation: rewardCardSoftDrop;
    --reward-card-enter-delay: 220ms;
}

.sticker-card:nth-child(4) .reward-art {
    --reward-mascot-animation: rewardMascotPeek;
    --reward-bob-duration: 2520ms;
    --reward-bob-delay: -900ms;
    --reward-glow-duration: 9.6s;
    --reward-glow-delay: -1800ms;
    --reward-shine-duration: 3350ms;
    --reward-shine-delay: 760ms;
    --reward-sparkle-duration: 2380ms;
    --reward-sparkle-one-delay: 360ms;
    --reward-sparkle-two-delay: 840ms;
    --reward-sparkle-three-delay: 1280ms;
    --reward-token-duration: 2720ms;
    --reward-token-delay: -840ms;
}

.sticker-card:nth-child(5) {
    --reward-card-enter-animation: rewardCardPopIn;
    --reward-card-enter-delay: 280ms;
}

.sticker-card:nth-child(5) .reward-art {
    --reward-mascot-animation: rewardMascotBob;
    --reward-bob-duration: 2760ms;
    --reward-bob-delay: -1160ms;
    --reward-glow-duration: 11s;
    --reward-glow-delay: -2300ms;
    --reward-shine-duration: 3750ms;
    --reward-shine-delay: 940ms;
    --reward-sparkle-duration: 2580ms;
    --reward-sparkle-one-delay: 120ms;
    --reward-sparkle-two-delay: 640ms;
    --reward-sparkle-three-delay: 1180ms;
    --reward-token-duration: 2920ms;
    --reward-token-delay: -1080ms;
}

.sticker-card:nth-child(6) {
    --reward-card-enter-animation: rewardCardFloatIn;
    --reward-card-enter-delay: 345ms;
}

.sticker-card:nth-child(6) .reward-art {
    --reward-mascot-animation: rewardMascotHop;
    --reward-bob-duration: 2320ms;
    --reward-bob-delay: -1420ms;
    --reward-glow-duration: 8.8s;
    --reward-glow-delay: -300ms;
    --reward-shine-duration: 3500ms;
    --reward-shine-delay: 1120ms;
    --reward-sparkle-duration: 2290ms;
    --reward-sparkle-one-delay: 440ms;
    --reward-sparkle-two-delay: 940ms;
    --reward-sparkle-three-delay: 1340ms;
    --reward-token-duration: 2460ms;
    --reward-token-delay: -1320ms;
}

.sticker-card:nth-child(7) {
    --reward-card-enter-animation: rewardCardSlideIn;
    --reward-card-enter-delay: 405ms;
}

.sticker-card:nth-child(7) .reward-art {
    --reward-mascot-animation: rewardMascotPeek;
    --reward-bob-duration: 3040ms;
    --reward-bob-delay: -1600ms;
    --reward-glow-duration: 10.6s;
    --reward-glow-delay: -900ms;
    --reward-shine-duration: 4200ms;
    --reward-shine-delay: 260ms;
    --reward-sparkle-duration: 2820ms;
    --reward-sparkle-one-delay: 240ms;
    --reward-sparkle-two-delay: 760ms;
    --reward-sparkle-three-delay: 1440ms;
    --reward-token-duration: 3180ms;
    --reward-token-delay: -1520ms;
}

.sticker-card:nth-child(8) {
    --reward-card-enter-animation: rewardCardSoftDrop;
    --reward-card-enter-delay: 470ms;
}

.sticker-card:nth-child(8) .reward-art {
    --reward-mascot-animation: rewardMascotSway;
    --reward-bob-duration: 2480ms;
    --reward-bob-delay: -1860ms;
    --reward-glow-duration: 9.2s;
    --reward-glow-delay: -1500ms;
    --reward-shine-duration: 3300ms;
    --reward-shine-delay: 620ms;
    --reward-sparkle-duration: 2440ms;
    --reward-sparkle-one-delay: 520ms;
    --reward-sparkle-two-delay: 1040ms;
    --reward-sparkle-three-delay: 1500ms;
    --reward-token-duration: 2660ms;
    --reward-token-delay: -1740ms;
}

.sticker-card:nth-child(9) {
    --reward-card-enter-animation: rewardCardFloatIn;
    --reward-card-enter-delay: 530ms;
}

.sticker-card:nth-child(9) .reward-art {
    --reward-mascot-animation: rewardMascotBob;
    --reward-bob-duration: 2940ms;
    --reward-bob-delay: -2100ms;
    --reward-glow-duration: 10.8s;
    --reward-glow-delay: -2100ms;
    --reward-shine-duration: 4100ms;
    --reward-shine-delay: 860ms;
    --reward-sparkle-duration: 2740ms;
    --reward-sparkle-one-delay: 80ms;
    --reward-sparkle-two-delay: 820ms;
    --reward-sparkle-three-delay: 1580ms;
    --reward-token-duration: 3020ms;
    --reward-token-delay: -1960ms;
}

.sticker-card:nth-child(10) {
    --reward-card-enter-animation: rewardCardPopIn;
    --reward-card-enter-delay: 595ms;
}

.sticker-card:nth-child(10) .reward-art {
    --reward-mascot-animation: rewardMascotHop;
    --reward-bob-duration: 2680ms;
    --reward-bob-delay: -2340ms;
    --reward-glow-duration: 8.6s;
    --reward-glow-delay: -2600ms;
    --reward-shine-duration: 3440ms;
    --reward-shine-delay: 1040ms;
    --reward-sparkle-duration: 2520ms;
    --reward-sparkle-one-delay: 320ms;
    --reward-sparkle-two-delay: 1120ms;
    --reward-sparkle-three-delay: 1660ms;
    --reward-token-duration: 2820ms;
    --reward-token-delay: -2200ms;
}

.sticker-card:nth-child(11) {
    --reward-card-enter-animation: rewardCardSlideIn;
    --reward-card-enter-delay: 655ms;
}

.sticker-card:nth-child(11) .reward-art {
    --reward-mascot-animation: rewardMascotSway;
    --reward-bob-duration: 3180ms;
    --reward-bob-delay: -2580ms;
    --reward-glow-duration: 11.4s;
    --reward-glow-delay: -500ms;
    --reward-shine-duration: 3860ms;
    --reward-shine-delay: 180ms;
    --reward-sparkle-duration: 2920ms;
    --reward-sparkle-one-delay: 460ms;
    --reward-sparkle-two-delay: 980ms;
    --reward-sparkle-three-delay: 1740ms;
    --reward-token-duration: 3240ms;
    --reward-token-delay: -2460ms;
}

.sticker-card:nth-child(12) {
    --reward-card-enter-animation: rewardCardSoftDrop;
    --reward-card-enter-delay: 720ms;
}

.sticker-card:nth-child(12) .reward-art {
    --reward-mascot-animation: rewardMascotPeek;
    --reward-bob-duration: 2440ms;
    --reward-bob-delay: -280ms;
    --reward-glow-duration: 9.8s;
    --reward-glow-delay: -1100ms;
    --reward-shine-duration: 3650ms;
    --reward-shine-delay: 460ms;
    --reward-sparkle-duration: 2360ms;
    --reward-sparkle-one-delay: 600ms;
    --reward-sparkle-two-delay: 1180ms;
    --reward-sparkle-three-delay: 1860ms;
    --reward-token-duration: 2580ms;
    --reward-token-delay: -300ms;
}

.sticker-card:nth-child(13) {
    --reward-card-enter-animation: rewardCardPopIn;
    --reward-card-enter-delay: 780ms;
}

.sticker-card:nth-child(13) .reward-art {
    --reward-mascot-animation: rewardMascotBob;
    --reward-bob-duration: 2720ms;
    --reward-bob-delay: -560ms;
    --reward-glow-duration: 10.4s;
    --reward-glow-delay: -1700ms;
    --reward-shine-duration: 4050ms;
    --reward-shine-delay: 700ms;
    --reward-sparkle-duration: 2620ms;
    --reward-sparkle-one-delay: 200ms;
    --reward-sparkle-two-delay: 1240ms;
    --reward-sparkle-three-delay: 1940ms;
    --reward-token-duration: 2980ms;
    --reward-token-delay: -540ms;
}

.sticker-card:nth-child(14) {
    --reward-card-enter-animation: rewardCardFloatIn;
    --reward-card-enter-delay: 845ms;
}

.sticker-card:nth-child(14) .reward-art {
    --reward-mascot-animation: rewardMascotHop;
    --reward-bob-duration: 3060ms;
    --reward-bob-delay: -840ms;
    --reward-glow-duration: 8.9s;
    --reward-glow-delay: -2200ms;
    --reward-shine-duration: 3420ms;
    --reward-shine-delay: 980ms;
    --reward-sparkle-duration: 2840ms;
    --reward-sparkle-one-delay: 540ms;
    --reward-sparkle-two-delay: 1320ms;
    --reward-sparkle-three-delay: 2020ms;
    --reward-token-duration: 3160ms;
    --reward-token-delay: -760ms;
}

.sticker-card:nth-child(15) {
    --reward-card-enter-animation: rewardCardSlideIn;
    --reward-card-enter-delay: 905ms;
}

.sticker-card:nth-child(15) .reward-art {
    --reward-mascot-animation: rewardMascotSway;
    --reward-bob-duration: 2360ms;
    --reward-bob-delay: -1120ms;
    --reward-glow-duration: 11.2s;
    --reward-glow-delay: -2800ms;
    --reward-shine-duration: 3720ms;
    --reward-shine-delay: 1240ms;
    --reward-sparkle-duration: 2280ms;
    --reward-sparkle-one-delay: 140ms;
    --reward-sparkle-two-delay: 1060ms;
    --reward-sparkle-three-delay: 2100ms;
    --reward-token-duration: 2480ms;
    --reward-token-delay: -1020ms;
}

.sticker-card:nth-child(16) {
    --reward-card-enter-animation: rewardCardSoftDrop;
    --reward-card-enter-delay: 970ms;
}

.sticker-card:nth-child(16) .reward-art {
    --reward-mascot-animation: rewardMascotPeek;
    --reward-bob-duration: 2840ms;
    --reward-bob-delay: -1380ms;
    --reward-glow-duration: 9.4s;
    --reward-glow-delay: -400ms;
    --reward-shine-duration: 3920ms;
    --reward-shine-delay: 320ms;
    --reward-sparkle-duration: 2660ms;
    --reward-sparkle-one-delay: 380ms;
    --reward-sparkle-two-delay: 1380ms;
    --reward-sparkle-three-delay: 2180ms;
    --reward-token-duration: 2880ms;
    --reward-token-delay: -1260ms;
}

.sticker-card:nth-child(17) {
    --reward-card-enter-animation: rewardCardFloatIn;
    --reward-card-enter-delay: 1030ms;
}

.sticker-card:nth-child(17) .reward-art {
    --reward-mascot-animation: rewardMascotBob;
    --reward-bob-duration: 3140ms;
    --reward-bob-delay: -1660ms;
    --reward-glow-duration: 10.9s;
    --reward-glow-delay: -1000ms;
    --reward-shine-duration: 4180ms;
    --reward-shine-delay: 580ms;
    --reward-sparkle-duration: 2960ms;
    --reward-sparkle-one-delay: 680ms;
    --reward-sparkle-two-delay: 1440ms;
    --reward-sparkle-three-delay: 2260ms;
    --reward-token-duration: 3280ms;
    --reward-token-delay: -1540ms;
}

.sticker-card:nth-child(18) {
    --reward-card-enter-animation: rewardCardPopIn;
    --reward-card-enter-delay: 1095ms;
}

.sticker-card:nth-child(18) .reward-art {
    --reward-mascot-animation: rewardMascotHop;
    --reward-bob-duration: 2460ms;
    --reward-bob-delay: -1940ms;
    --reward-glow-duration: 8.7s;
    --reward-glow-delay: -1600ms;
    --reward-shine-duration: 3560ms;
    --reward-shine-delay: 820ms;
    --reward-sparkle-duration: 2400ms;
    --reward-sparkle-one-delay: 260ms;
    --reward-sparkle-two-delay: 1500ms;
    --reward-sparkle-three-delay: 2340ms;
    --reward-token-duration: 2640ms;
    --reward-token-delay: -1820ms;
}

.sticker-card:nth-child(19) {
    --reward-card-enter-animation: rewardCardSlideIn;
    --reward-card-enter-delay: 1155ms;
}

.sticker-card:nth-child(19) .reward-art {
    --reward-mascot-animation: rewardMascotSway;
    --reward-bob-duration: 2920ms;
    --reward-bob-delay: -2200ms;
    --reward-glow-duration: 10.1s;
    --reward-glow-delay: -2400ms;
    --reward-shine-duration: 3840ms;
    --reward-shine-delay: 1080ms;
    --reward-sparkle-duration: 2760ms;
    --reward-sparkle-one-delay: 500ms;
    --reward-sparkle-two-delay: 1560ms;
    --reward-sparkle-three-delay: 2420ms;
    --reward-token-duration: 3040ms;
    --reward-token-delay: -2100ms;
}

.sticker-card:nth-child(20) {
    --reward-card-enter-animation: rewardCardSoftDrop;
    --reward-card-enter-delay: 1220ms;
}

.sticker-card:nth-child(20) .reward-art {
    --reward-mascot-animation: rewardMascotPeek;
    --reward-bob-duration: 2560ms;
    --reward-bob-delay: -2460ms;
    --reward-glow-duration: 11.6s;
    --reward-glow-delay: -3000ms;
    --reward-shine-duration: 4020ms;
    --reward-shine-delay: 1300ms;
    --reward-sparkle-duration: 2500ms;
    --reward-sparkle-one-delay: 740ms;
    --reward-sparkle-two-delay: 1620ms;
    --reward-sparkle-three-delay: 2500ms;
    --reward-token-duration: 2860ms;
    --reward-token-delay: -2360ms;
}

.sticker-card:nth-child(5n+2) .reward-art {
    --reward-accent: var(--teal);
    --reward-deep: var(--green);
    --reward-light: #91eee7;
    --reward-bg: #e8fbf7;
}

.sticker-card:nth-child(5n+3) .reward-art {
    --reward-accent: var(--coral);
    --reward-deep: var(--purple);
    --reward-light: #ffc1ad;
    --reward-bg: #fff0ea;
}

.sticker-card:nth-child(5n+4) .reward-art {
    --reward-accent: var(--green);
    --reward-deep: var(--teal);
    --reward-light: #acefbe;
    --reward-bg: #effbea;
}

.sticker-card:nth-child(5n+5) .reward-art {
    --reward-accent: var(--pink);
    --reward-deep: var(--blue);
    --reward-light: #ffc3df;
    --reward-bg: #fff0f7;
}

.sticker-card.unlocked {
    background:
        linear-gradient(135deg, rgba(54, 124, 246, 0.10), transparent 44%),
        linear-gradient(180deg, #ffffff, #fff9df),
        var(--panel);
}

.sticker-card.locked .reward-art {
    --reward-accent: #b9c5d8;
    --reward-deep: #7d89a0;
    --reward-light: #edf4ff;
    --reward-bg: #f7f9fe;
    filter: saturate(0.72);
    box-shadow:
        inset 0 0 0 2px rgba(255, 255, 255, 0.92),
        0 7px 0 rgba(23, 32, 51, 0.16);
}

.sticker-card.locked::after {
    content: "Locked";
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 8px;
    border-radius: 999px;
    background: #eef3fb;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 800;
}

.progress-strip {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 14px;
}

.reward-card:not(.unlocked) {
    --reward-card-opacity: 0.86;
}

.reward-card.unlocked .reward-art,
.reward-art.is-unlocked {
    border-color: var(--reward-ink);
    outline: 2px solid rgba(53, 166, 91, 0.34);
    outline-offset: 2px;
    box-shadow:
        inset 0 0 0 2px rgba(255, 255, 255, 0.92),
        0 9px 0 rgba(23, 32, 51, 0.18),
        0 14px 30px rgba(245, 184, 46, 0.20);
}

.reward-card.unlocked .badge-mark {
    background:
        linear-gradient(135deg, var(--green), var(--teal));
    box-shadow: 0 6px 0 rgba(23, 32, 51, 0.14);
}

@media (prefers-reduced-motion: reduce) {
    .sticker-card {
        animation: none;
    }
}

.reward-card p,
.reward-card small {
    color: var(--muted);
}

.reward-friends {
    min-height: 34px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    align-self: end;
    padding-top: 2px;
}

.reward-friend-count {
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 800;
}

.reward-friends.empty {
    color: var(--muted);
}

.table-panel {
    overflow-x: auto;
}

.leader-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 720px;
}

.leader-table th,
.leader-table td {
    padding: 14px 12px;
    border-bottom: 1px solid var(--line);
    text-align: left;
}

.leader-table th {
    color: var(--muted);
    font-size: 0.82rem;
    text-transform: uppercase;
}

.leader-table tr.current {
    background: rgba(54, 124, 246, 0.09);
}

.leader-table tbody tr:nth-child(odd):not(.current) {
    background: rgba(255, 255, 255, 0.56);
}

.admin-stat-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.admin-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 380px);
    gap: 18px;
    align-items: start;
}

.admin-main,
.admin-sidebar {
    display: grid;
    gap: 18px;
}

.admin-table {
    min-width: 980px;
}

.admin-table td strong,
.admin-table td small {
    display: block;
}

.admin-table td small,
.admin-subject-row small,
.activity-item small,
.activity-item p {
    color: var(--muted);
}

.admin-table td small {
    margin-top: 4px;
    font-size: 0.78rem;
    font-weight: 700;
}

.admin-subject-list,
.activity-list {
    display: grid;
    gap: 10px;
}

.admin-subject-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    align-items: center;
    padding: 12px;
    border: 2px solid var(--line);
    border-left: 6px solid var(--teal);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: var(--soft-shadow);
}

.admin-subject-row.accent-coral {
    border-left-color: var(--coral);
}

.admin-subject-row.accent-gold {
    border-left-color: var(--gold);
}

.admin-subject-row.accent-green {
    border-left-color: var(--green);
}

.admin-subject-row.accent-purple {
    border-left-color: var(--purple);
}

.admin-subject-row strong,
.admin-subject-row small {
    display: block;
}

.admin-subject-row > div:last-child {
    display: grid;
    justify-items: end;
    gap: 4px;
}

.activity-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.activity-item {
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr) auto;
    gap: 12px;
    align-items: center;
    padding: 12px;
    border: 2px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: var(--soft-shadow);
}

.activity-mark {
    display: inline-grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: var(--blue);
    color: #ffffff;
    font-weight: 900;
}

.activity-joined .activity-mark {
    background: var(--teal);
}

.activity-practice .activity-mark {
    background: var(--green);
}

.activity-reward .activity-mark {
    background: var(--gold);
    color: var(--ink);
}

.activity-item strong,
.activity-item small {
    display: block;
}

.activity-item p {
    margin: 3px 0;
    font-size: 0.88rem;
}

.activity-item em {
    color: var(--muted);
    font-style: normal;
    font-weight: 800;
}

.activity-empty {
    padding: 12px;
    color: var(--muted);
}

.admin-forbidden-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.easter-egg {
    position: fixed;
    inset: 0;
    z-index: 80;
    display: grid;
    place-items: center;
    padding: 22px;
    pointer-events: none;
}

.easter-egg[hidden] {
    display: none;
}

.easter-egg-card {
    width: min(360px, 100%);
    padding: 20px;
    border: 2px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
    text-align: center;
    animation: egg-card-in 360ms ease both;
}

.easter-egg-kicker,
.easter-egg-card small {
    display: block;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
}

.easter-egg-card strong {
    display: block;
    margin: 8px 0;
    font-size: 1.1rem;
}

.egg-token {
    position: fixed;
    z-index: 79;
    left: var(--egg-left);
    top: var(--egg-top);
    color: var(--egg-color);
    font-weight: 900;
    pointer-events: none;
    animation: egg-token-float 1200ms ease-out both;
}

@keyframes egg-card-in {
    from {
        opacity: 0;
        transform: translateY(12px) scale(0.98);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes egg-token-float {
    from {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.8);
    }

    20% {
        opacity: 1;
    }

    to {
        opacity: 0;
        transform: translate(calc(-50% + var(--egg-drift)), -160px) rotate(var(--egg-rotate)) scale(1.12);
    }
}

@media (prefers-reduced-motion: reduce) {
    .easter-egg-card,
    .egg-token {
        animation: none;
    }
}

@media (max-width: 980px) {
    .topbar,
    .user-actions,
    .hero-panel,
    .page-heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .nav-links {
        margin-left: 0;
        flex-wrap: wrap;
    }

    .login-grid,
    .dashboard-layout,
    .admin-layout,
    .friend-profile-layout,
    .account-hero,
    .account-layout,
    .two-column,
    .practice-layout {
        grid-template-columns: 1fr;
    }

    .account-avatar-panel {
        position: static;
    }

    .stat-grid,
    .subject-grid,
    .topic-grid,
    .reward-grid,
    .friend-grid,
    .sticker-book,
    .progress-strip {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .math-board {
        min-height: 280px;
    }

    .login-showcase {
        min-height: 420px;
    }

    .lesson-card {
        right: 24px;
        width: min(58%, 280px);
    }
}

@media (max-width: 620px) {
    .page {
        width: min(100% - 20px, 1180px);
        padding-top: 16px;
    }

    .page-loading {
        padding-top: 92px;
    }

    .page-loading-panel {
        padding: 18px;
    }

    .skeleton-grid {
        grid-template-columns: 1fr;
    }

    .skeleton-grid span {
        height: 52px;
    }

    .stat-grid,
    .subject-grid,
    .topic-grid,
    .reward-grid,
    .friend-grid,
    .sticker-book,
    .progress-strip {
        grid-template-columns: 1fr;
    }

    .subject-row,
    .topic-row,
    .topic-row-progress,
    .admin-subject-row,
    .activity-item,
    .practice-answer-row,
    .leader-list li,
    .friend-search-row,
    .account-field-grid,
    .account-summary {
        grid-template-columns: 1fr;
    }

    .account-identity {
        align-items: flex-start;
        flex-direction: column;
    }

    .account-form .button {
        justify-self: stretch;
    }

    .login-card-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .login-card .auth-switch {
        align-items: center;
        flex-direction: column;
        text-align: center;
    }

    .login-showcase {
        min-height: 330px;
    }

    .lesson-card {
        top: 18px;
        right: 12px;
        width: min(76%, 245px);
        min-width: 0;
        padding: 14px;
    }

    .lesson-equation {
        margin-top: 16px;
    }

    .lesson-equation span {
        font-size: 1.05rem;
    }

    .login-mascot {
        left: 6px;
        bottom: 12px;
        transform: scale(0.82);
        transform-origin: left bottom;
        animation: none;
    }

    .floating-token {
        width: 42px;
        height: 42px;
        font-size: 0.82rem;
    }

    .token-one {
        left: 16px;
        top: 18px;
    }

    .token-two {
        right: 16px;
        bottom: 34px;
    }

    .token-three {
        display: none;
    }

    .topic-row-progress strong {
        text-align: left;
    }

    .admin-subject-row > div:last-child {
        justify-items: start;
    }
}

/* Kiddish 90s classroom theme */
:root {
    --bg: #7ef5ff;
    --panel: #fff6b8;
    --ink: #151515;
    --muted: #4d3f61;
    --line: #151515;
    --teal: #00b9b2;
    --coral: #ff4f79;
    --gold: #ffe34d;
    --green: #55d94c;
    --blue: #2455ff;
    --purple: #8f35ff;
    --pink: #ff5fc7;
    --success: #168a37;
    --danger: #c81745;
    --shadow: 8px 8px 0 rgba(21, 21, 21, 0.34);
    --soft-shadow: 4px 4px 0 rgba(21, 21, 21, 0.24);
}

body {
    background:
        repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.32) 0 10px, rgba(255, 255, 255, 0) 10px 20px),
        linear-gradient(90deg, rgba(255, 95, 199, 0.22) 0 14px, transparent 14px 28px),
        linear-gradient(180deg, #7ef5ff 0%, #fff178 44%, #81f27b 100%);
    color: var(--ink);
    font-family: "Comic Sans MS", "Trebuchet MS", "Arial Rounded MT Bold", system-ui, sans-serif;
}

.topbar {
    flex-wrap: wrap;
    gap: 12px;
    min-height: 84px;
    padding: 10px clamp(12px, 3vw, 34px) 16px;
    border: 4px outset #fff27a;
    border-left: 0;
    border-right: 0;
    background:
        linear-gradient(180deg, #fff27a 0 24px, #ff80d5 24px 31px, #7ef5ff 31px 100%);
    box-shadow: 0 5px 0 #151515;
    backdrop-filter: none;
}

.topbar::after,
.hero-panel::before,
.page-heading::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    height: 10px;
    background:
        repeating-linear-gradient(90deg, #151515 0 10px, #ffffff 10px 20px, #ffe34d 20px 30px, #55d94c 30px 40px);
    pointer-events: none;
}

.topbar::after {
    bottom: 0;
}

.brand-logo-mark {
    width: 156px;
    height: 46px;
    padding: 3px 7px;
    border: 3px outset #ffffff;
    border-radius: 2px;
    background: #ffffff;
    box-shadow: 4px 4px 0 rgba(21, 21, 21, 0.28);
}

.brand-logo-mark:hover {
    transform: translate(-1px, -2px) rotate(-1deg);
}

.nav-links {
    flex-wrap: wrap;
    gap: 7px;
}

.nav-links a,
.user-pill {
    min-height: 42px;
    padding: 5px 9px 5px 5px;
    border: 3px outset #ffffff;
    border-radius: 2px;
    background: #8ffff5;
    color: #151515;
    box-shadow: 4px 4px 0 rgba(21, 21, 21, 0.30);
    font-size: 0.88rem;
    font-weight: 900;
    text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.72);
}

.nav-links a:nth-child(2) {
    background: #fff178;
}

.nav-links a:nth-child(3) {
    background: #ffc1e8;
}

.nav-links a:nth-child(4) {
    background: #b7ff85;
}

.nav-links a:nth-child(5) {
    background: #cdb8ff;
}

.nav-token {
    display: inline-grid;
    place-items: center;
    min-width: 34px;
    height: 26px;
    padding: 0 5px;
    border: 2px solid #151515;
    border-radius: 1px;
    background: #ffffff;
    color: #151515;
    font-size: 0.72rem;
    line-height: 1;
    box-shadow: inset 2px 2px 0 rgba(255, 227, 77, 0.72);
}

.nav-links a:hover,
.user-pill:hover {
    background: #ffffff;
    color: #151515;
    transform: translate(-1px, -2px);
    box-shadow: 6px 6px 0 rgba(21, 21, 21, 0.32);
}

.nav-links a.active,
.nav-links a[aria-current="page"],
.user-pill.active,
.user-pill[aria-current="page"] {
    border-style: inset;
    background: #ff4f79;
    color: #ffffff;
    box-shadow: 2px 2px 0 rgba(21, 21, 21, 0.38);
    text-shadow: 1px 1px 0 #151515;
    transform: translate(2px, 2px);
}

.nav-links a.active .nav-token,
.nav-links a[aria-current="page"] .nav-token {
    background: #ffe34d;
}

.nav-links a.active:hover,
.nav-links a[aria-current="page"]:hover,
.user-pill.active:hover,
.user-pill[aria-current="page"]:hover {
    background: #2455ff;
    color: #ffffff;
}

.user-actions {
    flex-wrap: wrap;
}

.user-avatar {
    border: 2px solid #151515;
    border-radius: 2px;
}

.page {
    padding-top: 34px;
}

.login-panel,
.panel,
.hero-panel,
.page-heading,
.stat-card,
.subject-card,
.topic-card,
.reward-card,
.rank-tile,
.friend-card,
.math-board,
.login-showcase,
.lesson-card,
.page-loading-panel,
.easter-egg-card {
    border: 4px ridge #ffffff;
    border-radius: 2px;
    outline: 2px solid #151515;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(255, 246, 184, 0.98)),
        var(--panel);
    box-shadow: var(--shadow);
}

.hero-panel,
.page-heading {
    padding: 32px 24px 22px;
    border-color: #ffffff;
    background:
        repeating-linear-gradient(90deg, rgba(36, 85, 255, 0.12) 0 14px, transparent 14px 28px),
        linear-gradient(135deg, #fff178, #ffffff 48%, #8ffff5);
}

.hero-panel::before,
.page-heading::before {
    top: 0;
}

.hero-panel::after {
    right: 16px;
    bottom: 16px;
    width: 130px;
    height: 28px;
    opacity: 0.78;
    border: 2px solid #151515;
    border-radius: 0;
    background:
        repeating-linear-gradient(90deg, #ff4f79 0 16px, #ffe34d 16px 32px, #55d94c 32px 48px, #2455ff 48px 64px);
}

.world-teal,
.world-green,
.world-gold,
.world-coral,
.world-purple {
    background:
        repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.46) 0 13px, transparent 13px 26px),
        linear-gradient(135deg, #fff178, #ffffff 52%, #8ffff5);
}

.eyebrow {
    display: inline-flex;
    min-height: 28px;
    align-items: center;
    margin-bottom: 12px;
    padding: 4px 8px;
    border: 2px solid #151515;
    border-radius: 2px;
    background: #ff80d5;
    color: #151515;
    font-size: 0.76rem;
    font-weight: 900;
    text-transform: uppercase;
    box-shadow: 3px 3px 0 rgba(21, 21, 21, 0.22);
}

h1,
h2 {
    color: #151515;
    font-family: "Comic Sans MS", "Trebuchet MS", "Arial Rounded MT Bold", system-ui, sans-serif;
    text-shadow: 2px 2px 0 rgba(255, 227, 77, 0.8);
}

h1 {
    font-size: clamp(1.85rem, 4vw, 2.55rem);
}

.button {
    border: 3px outset #ffffff;
    border-radius: 2px;
    background: #ffe34d;
    color: #151515;
    box-shadow: 4px 4px 0 rgba(21, 21, 21, 0.30);
    font-weight: 900;
    text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.65);
}

.button:hover {
    transform: translate(-1px, -2px);
    box-shadow: 6px 6px 0 rgba(21, 21, 21, 0.32);
}

.button.primary {
    background: #2455ff;
    color: #ffffff;
    text-shadow: 1px 1px 0 #151515;
}

.button.primary:hover {
    background: #ff4f79;
}

.button.ghost {
    border-color: #ffffff;
    background: #ffffff;
    color: #151515;
}

.button.ghost:hover {
    background: #fff178;
    border-color: #ffffff;
}

input,
select {
    border: 3px inset #ffffff;
    border-radius: 0;
    background: #ffffff;
    color: #151515;
    box-shadow: inset 2px 2px 0 rgba(21, 21, 21, 0.18);
    font-weight: 800;
}

input:focus,
select:focus {
    outline: 4px solid rgba(255, 79, 121, 0.36);
    border-color: #2455ff;
}

.stat-card,
.subject-card,
.topic-card,
.reward-card,
.friend-card {
    background:
        repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.34) 0 9px, transparent 9px 18px),
        #fff6b8;
}

.stat-card:hover,
.subject-card:hover,
.topic-card:hover,
.friend-card:hover,
.reward-card:hover {
    transform: translate(-2px, -3px);
    box-shadow: 10px 10px 0 rgba(21, 21, 21, 0.35);
}

.stat-card strong,
.rank-tile strong,
.subject-metrics strong,
.friend-metrics strong {
    color: #2455ff;
    text-shadow: 2px 2px 0 rgba(255, 227, 77, 0.72);
}

.quest-card,
.subject-row,
.topic-row,
.friend-reward-item,
.account-summary span,
.friend-metrics span,
.practice-question,
.answer-feedback {
    border: 3px outset #ffffff;
    border-radius: 2px;
    background: #ffffff;
    box-shadow: var(--soft-shadow);
}

.quest-card.complete {
    background: #dfff99;
}

.subject-row,
.topic-row {
    padding: 14px;
    border-left-width: 10px;
    border-bottom: 3px solid #151515;
}

.subject-card-header > strong,
.badge-mark,
.login-badge,
.floating-token,
.leaderboard-tab,
.subject-chip,
.practice-meta span,
.badge-unlocks span,
.subject-rating,
.subject-status {
    border: 2px solid #151515;
    border-radius: 2px;
    box-shadow: 3px 3px 0 rgba(21, 21, 21, 0.24);
}

.subject-card-header > strong,
.badge-mark {
    background: #151515;
    color: #ffffff;
}

.subject-status,
.rating-high,
.rating-good,
.badge-unlocks span {
    background: #dfff99;
    color: #176b2b;
}

.rating-none,
.practice-meta span {
    background: #ffffff;
    color: #4d3f61;
}

.rating-mid {
    background: #fff178;
    color: #6c4b00;
}

.rating-low {
    background: #ffd6e2;
    color: #c81745;
}

.subject-start,
.section-heading a,
.table-link,
.auth-switch a {
    color: #2455ff;
    font-weight: 900;
    text-decoration: underline;
    text-decoration-thickness: 2px;
}

.meter {
    height: 15px;
    border: 2px inset #ffffff;
    border-radius: 0;
    background:
        repeating-linear-gradient(90deg, #d8d8d8 0 8px, #ffffff 8px 16px);
}

.meter span,
.lesson-progress span {
    border-radius: 0;
    background:
        repeating-linear-gradient(90deg, #55d94c 0 12px, #ffe34d 12px 24px, #ff4f79 24px 36px, #2455ff 36px 48px);
}

.login-card {
    background:
        repeating-linear-gradient(45deg, rgba(255, 95, 199, 0.18) 0 12px, transparent 12px 24px),
        #fff6b8;
}

.login-card::after {
    display: none;
}

.login-showcase,
.math-board {
    background:
        linear-gradient(90deg, rgba(21, 21, 21, 0.08) 1px, transparent 1px),
        linear-gradient(rgba(21, 21, 21, 0.08) 1px, transparent 1px),
        linear-gradient(135deg, #fff178, #8ffff5 54%, #ffc1e8);
    background-size: 28px 28px, 28px 28px, auto;
}

.login-showcase::before {
    inset: 0;
    border-radius: 0;
    background:
        repeating-linear-gradient(90deg, transparent 0 20px, rgba(255, 255, 255, 0.44) 20px 26px),
        repeating-linear-gradient(0deg, transparent 0 20px, rgba(255, 255, 255, 0.44) 20px 26px);
    opacity: 0.45;
    animation: none;
}

.lesson-card {
    background: #ffffff;
}

.lesson-chip {
    border: 2px solid #151515;
    border-radius: 2px;
    background: #fff178;
    color: #151515;
}

.lesson-progress {
    height: 15px;
    border: 2px inset #ffffff;
    border-radius: 0;
    background: #d8d8d8;
}

.board-row {
    border: 3px outset #ffffff;
    border-radius: 2px;
    background: #ffffff;
    box-shadow: var(--soft-shadow);
}

.login-mascot,
.reward-art {
    image-rendering: auto;
}

.reward-art {
    border-radius: 2px;
    box-shadow:
        inset 0 0 0 2px rgba(255, 255, 255, 0.92),
        6px 6px 0 rgba(21, 21, 21, 0.28);
}

.leaderboard-tab,
.subject-chip {
    background: #ffffff;
    color: #151515;
}

.leaderboard-tab.active,
.subject-chip.active {
    border-color: #151515;
    background: #fff178;
    color: #151515;
}

.leader-table {
    border: 3px ridge #ffffff;
    border-collapse: separate;
    border-spacing: 0;
    background: #ffffff;
}

.leader-table th {
    background: #151515;
    color: #ffffff;
}

.leader-table th,
.leader-table td {
    border-bottom: 2px solid #151515;
}

.leader-table tr.current {
    background: #fff178;
}

.leader-list li {
    padding: 10px;
    border: 2px outset #ffffff;
    border-radius: 2px;
    background: #ffffff;
    box-shadow: var(--soft-shadow);
}

.page-loading {
    background:
        repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.34) 0 14px, rgba(255, 255, 255, 0) 14px 28px),
        rgba(126, 245, 255, 0.78);
    backdrop-filter: none;
}

.skeleton-line,
.skeleton-grid span {
    border-radius: 0;
    background:
        repeating-linear-gradient(90deg, #fff178 0 18px, #ff80d5 18px 36px, #8ffff5 36px 54px);
}

.easter-egg-card {
    background: #fff6b8;
}

@media (max-width: 980px) {
    .topbar {
        align-items: stretch;
    }

    .nav-links {
        width: 100%;
        margin-left: 0;
    }
}

@media (max-width: 620px) {
    .topbar {
        padding: 10px 10px 16px;
    }

    .brand-logo-mark {
        width: 144px;
    }

    .nav-links a {
        flex: 1 1 calc(50% - 8px);
        justify-content: flex-start;
    }

    .user-actions,
    .user-actions form,
    .user-actions .button,
    .user-pill {
        width: 100%;
    }

    .hero-panel,
    .page-heading {
        padding: 28px 16px 18px;
    }
}