.yksq-app,
.yksq-app * { box-sizing: border-box; }
.yksq-app {
    --yksq-primary: #6c5ce7;
    --yksq-accent: #ff7675;
    --yksq-ink: #263238;
    --yksq-soft: #f6f4ff;
    position: relative;
    max-width: 920px;
    margin: 24px auto;
    padding: clamp(16px, 3vw, 32px);
    border-radius: 30px;
    color: var(--yksq-ink);
    background: radial-gradient(circle at 10% 0%, #fff4cf 0, transparent 26%), radial-gradient(circle at 100% 20%, #e6f8ff 0, transparent 28%), linear-gradient(145deg, #ffffff, var(--yksq-soft));
    box-shadow: 0 24px 70px rgba(66, 51, 126, .16);
    overflow: hidden;
    font-family: inherit;
}
.yksq-screen { display: none; position: relative; z-index: 2; }
.yksq-screen.is-active { display: block; animation: yksqFade .35s ease both; }
@keyframes yksqFade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.yksq-hero { display: flex; align-items: center; gap: 22px; margin-bottom: 28px; }
.yksq-mascot { display: grid; place-items: center; width: 104px; height: 104px; flex: 0 0 104px; border-radius: 32px; background: #fff; font-size: 58px; box-shadow: 0 14px 30px rgba(55, 42, 112, .13); transform: rotate(-3deg); }
.yksq-kicker { display: inline-flex; padding: 6px 12px; border-radius: 999px; color: var(--yksq-primary); background: color-mix(in srgb, var(--yksq-primary) 10%, white); font-weight: 800; font-size: 13px; }
.yksq-hero h2, .yksq-result h2 { margin: 9px 0 7px; font-size: clamp(27px, 4vw, 43px); line-height: 1.08; }
.yksq-hero p { margin: 0; font-size: 17px; opacity: .78; }
.yksq-setup-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.yksq-field { display: grid; gap: 7px; font-weight: 800; }
.yksq-field span { font-size: 14px; }
.yksq-field input, .yksq-field select { width: 100%; min-height: 52px; padding: 0 15px; border: 2px solid #e9e5fa; border-radius: 15px; background: #fff; color: var(--yksq-ink); font: inherit; outline: none; }
.yksq-field input:focus, .yksq-field select:focus { border-color: var(--yksq-primary); box-shadow: 0 0 0 4px color-mix(in srgb, var(--yksq-primary) 13%, transparent); }
.yksq-feature-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0; }
.yksq-feature-row span { padding: 9px 12px; border-radius: 12px; background: rgba(255,255,255,.82); box-shadow: 0 8px 18px rgba(44, 36, 82, .07); font-size: 13px; font-weight: 700; }
.yksq-primary-btn, .yksq-secondary-btn { border: 0; border-radius: 16px; padding: 15px 22px; font: inherit; font-weight: 900; cursor: pointer; transition: transform .18s ease, box-shadow .18s ease; }
.yksq-primary-btn { color: #fff; background: linear-gradient(135deg, var(--yksq-primary), color-mix(in srgb, var(--yksq-primary) 74%, #2d98da)); box-shadow: 0 12px 24px color-mix(in srgb, var(--yksq-primary) 30%, transparent); }
.yksq-secondary-btn { color: var(--yksq-primary); background: #fff; border: 2px solid #e8e2ff; }
.yksq-primary-btn:hover, .yksq-secondary-btn:hover { transform: translateY(-2px); }
.yksq-start > .yksq-primary-btn { width: 100%; font-size: 18px; }
.yksq-note { text-align: center; font-size: 12px; opacity: .62; margin: 13px 0 0; }
.yksq-topbar { display: grid; grid-template-columns: 1fr auto auto auto; align-items: center; gap: 10px; margin-bottom: 17px; }
.yksq-player, .yksq-stat, .yksq-lives { min-height: 46px; display: flex; align-items: center; gap: 8px; padding: 9px 12px; border-radius: 14px; background: #fff; box-shadow: 0 8px 20px rgba(46, 35, 92, .08); }
.yksq-lives { letter-spacing: 2px; }
.yksq-progress-meta { display: flex; justify-content: space-between; font-size: 13px; font-weight: 800; margin-bottom: 7px; }
.yksq-progress { height: 10px; border-radius: 999px; background: #e8e5f3; overflow: hidden; }
.yksq-progress span { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--yksq-primary), var(--yksq-accent)); transition: width .3s ease; }
.yksq-question-card { margin-top: 20px; padding: clamp(18px, 3vw, 30px); border-radius: 24px; background: rgba(255,255,255,.94); box-shadow: 0 17px 44px rgba(43, 32, 89, .11); }
.yksq-question-head { display: flex; justify-content: space-between; align-items: center; gap: 15px; }
.yksq-topic { display: inline-flex; padding: 7px 11px; border-radius: 999px; background: #f0edff; color: var(--yksq-primary); font-size: 12px; font-weight: 900; }
.yksq-timer { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 50%; background: #effcf6; color: #159765; border: 3px solid #b9efd7; font-weight: 900; }
.yksq-timer.is-low { background: #fff0f0; color: #d63031; border-color: #ffc5c5; animation: yksqPulse .7s infinite alternate; }
@keyframes yksqPulse { to { transform: scale(1.08); } }
.yksq-question-card h3 { margin: 18px 0 20px; font-size: clamp(19px, 2.6vw, 26px); line-height: 1.45; }
.yksq-options { display: grid; gap: 11px; }
.yksq-option { display: grid; grid-template-columns: 42px 1fr; align-items: center; gap: 12px; width: 100%; min-height: 58px; padding: 8px 14px 8px 8px; border: 2px solid #ece9f7; border-radius: 17px; color: var(--yksq-ink); background: #fff; text-align: left; font: inherit; font-weight: 700; cursor: pointer; transition: border-color .18s, transform .18s, background .18s, opacity .18s; }
.yksq-option:not(:disabled):hover { transform: translateX(4px); border-color: var(--yksq-primary); background: #faf9ff; }
.yksq-letter { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; color: var(--yksq-primary); background: #efecff; font-weight: 900; }
.yksq-option.is-selected { border-color: var(--yksq-primary); }
.yksq-option.is-correct { border-color: #00b894; background: #edfff9; }
.yksq-option.is-correct .yksq-letter { color: #fff; background: #00b894; }
.yksq-option.is-wrong { border-color: #ff7675; background: #fff2f2; }
.yksq-option.is-wrong .yksq-letter { color: #fff; background: #ff7675; }
.yksq-option.is-eliminated { opacity: .28; text-decoration: line-through; }
.yksq-feedback { margin-top: 16px; padding: 14px 16px; border-radius: 14px; font-weight: 750; line-height: 1.5; }
.yksq-feedback.is-correct { background: #eafff7; color: #087c5b; }
.yksq-feedback.is-wrong { background: #fff0f0; color: #a62c2c; }
.yksq-feedback.is-pass { background: #fff8de; color: #8a6c00; }
.yksq-tools { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-top: 17px; }
.yksq-tools button { padding: 10px 15px; border: 0; border-radius: 12px; background: #fff; color: var(--yksq-ink); box-shadow: 0 8px 19px rgba(42, 32, 86, .08); font: inherit; font-weight: 800; cursor: pointer; }
.yksq-tools button:disabled { opacity: .5; cursor: not-allowed; }
.yksq-result { text-align: center; }
.yksq-result-icon { font-size: 75px; animation: yksqFloat 1.7s ease-in-out infinite alternate; }
@keyframes yksqFloat { to { transform: translateY(-8px) rotate(4deg); } }
.yksq-result > p { max-width: 620px; margin: 0 auto 22px; font-size: 17px; opacity: .75; }
.yksq-result-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.yksq-result-grid div { padding: 17px 10px; border-radius: 18px; background: #fff; box-shadow: 0 10px 26px rgba(47, 35, 96, .09); }
.yksq-result-grid span { display: block; margin-bottom: 5px; font-size: 12px; opacity: .65; font-weight: 800; }
.yksq-result-grid strong { font-size: 25px; }
.yksq-result-actions { display: flex; justify-content: center; gap: 12px; margin: 22px 0; }
.yksq-leaderboard { margin-top: 26px; padding: 20px; border-radius: 22px; background: rgba(255,255,255,.88); text-align: left; }
.yksq-leaderboard h3 { margin: 0 0 13px; text-align: center; }
.yksq-score-list { padding: 0; margin: 0; list-style: none; }
.yksq-score-list li { display: grid; grid-template-columns: 44px 1fr auto; align-items: center; gap: 10px; padding: 11px 8px; border-bottom: 1px solid #eeeaf8; }
.yksq-score-list li:last-child { border-bottom: 0; }
.yksq-score-list .rank { font-size: 21px; text-align: center; }
.yksq-score-list li > span:last-child { font-size: 13px; opacity: .72; }
.yksq-loading { position: absolute; inset: 0; z-index: 20; display: grid; place-content: center; justify-items: center; background: rgba(255,255,255,.9); }
.yksq-loading[hidden] { display: none; }
.yksq-spinner { width: 48px; height: 48px; border: 5px solid #e9e5ff; border-top-color: var(--yksq-primary); border-radius: 50%; animation: yksqSpin .8s linear infinite; }
@keyframes yksqSpin { to { transform: rotate(360deg); } }
.yksq-app.is-celebrating::before, .yksq-app.is-celebrating::after { content: '✨'; position: absolute; z-index: 5; font-size: 42px; animation: yksqPop .8s ease both; }
.yksq-app.is-celebrating::before { left: 7%; top: 25%; }
.yksq-app.is-celebrating::after { right: 7%; top: 35%; animation-delay: .1s; }
@keyframes yksqPop { 0% { opacity: 0; transform: scale(.2) rotate(-20deg); } 55% { opacity: 1; transform: scale(1.2); } 100% { opacity: 0; transform: translateY(-45px) scale(.7); } }
@media (max-width: 650px) {
    .yksq-app { margin: 12px 0; border-radius: 22px; }
    .yksq-hero { align-items: flex-start; }
    .yksq-mascot { width: 72px; height: 72px; flex-basis: 72px; font-size: 42px; border-radius: 22px; }
    .yksq-setup-grid { grid-template-columns: 1fr; }
    .yksq-topbar { grid-template-columns: 1fr auto auto; }
    .yksq-lives { grid-column: 1 / -1; justify-content: center; }
    .yksq-result-grid { grid-template-columns: repeat(2, 1fr); }
    .yksq-score-list li { grid-template-columns: 38px 1fr; }
    .yksq-score-list li > span:last-child { grid-column: 2; }
    .yksq-result-actions { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
    .yksq-app *, .yksq-app *::before, .yksq-app *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition: none !important; }
}