/* ============================================
   onlyMATHs — Responsive Breakpoints
   ============================================ */

/* ── Tablet ( ≤ 1024px ) ────────────────────── */
@media (max-width: 1024px) {
    :root {
        --section-gap: 80px;
    }

    .hero__inner {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }
    .hero__content { max-width: 100%; }
    .hero__actions { justify-content: center; }
    .hero__stats { justify-content: center; }
    .hero__visual { order: -1; }
    .hero__card-stack { max-width: 340px; }

    .games-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }

    .footer__grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }
    .footer__brand { grid-column: span 2; }

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

/* ── Mobile large ( ≤ 768px ) ───────────────── */
@media (max-width: 768px) {
    :root {
        --section-gap: 64px;
    }

    /* Nav mobile */
    .nav__toggle { display: flex; }
    .nav__links {
        position: fixed;
        top: 0; right: 0;
        width: min(320px, 85vw);
        height: 100vh;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 80px 24px 40px;
        background: rgba(10, 14, 26, .97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-left: 1px solid var(--glass-border);
        transform: translateX(100%);
        transition: transform .4s var(--ease-out);
        z-index: 999;
    }
    .nav__links.open { transform: translateX(0); }
    .nav__links a { padding: 14px 20px; font-size: 1rem; }

    .nav__toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .nav__toggle.active span:nth-child(2) { opacity: 0; }
    .nav__toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    body.nav-open { overflow: hidden; }

    /* Hero */
    .hero { min-height: auto; padding-top: 100px; padding-bottom: 60px; }
    .hero__title { font-size: clamp(2rem, 8vw, 3rem); }
    .hero__stats { gap: 24px; flex-wrap: wrap; }
    .hero__card-stack { max-width: 280px; }
    .hero__float-card { padding: 14px 18px; }
    .hero__float-card .card__q { font-size: 1.1rem; }

    /* Games */
    .games-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .game-card { padding: 24px 22px 22px; }

    /* Leaderboard */
    .lb-row { padding: 12px 16px; gap: 12px; }
    .lb-rank { width: 32px; height: 32px; font-size: .8rem; }
    .lb-avatar { width: 34px; height: 34px; }
    .lb-score { font-size: .95rem; }

    /* Steps */
    .steps-grid { grid-template-columns: 1fr; gap: 20px; }

    /* Footer */
    .footer__grid { grid-template-columns: 1fr; gap: 28px; }
    .footer__brand { grid-column: 1; }
    .footer__bottom { flex-direction: column; gap: 16px; text-align: center; }

    /* Form */
    .form-card { padding: 32px 24px; }

    /* Game page */
    .game-hud__bar { flex-wrap: wrap; gap: 12px; padding: 12px 16px; }
    .hud-stat { min-width: 60px; }
    .hud-stat__value { font-size: 1.1rem; }
    .question__text { font-size: clamp(1.6rem, 8vw, 2.5rem); }
    .answer-input { font-size: 1.2rem; padding: 14px 18px; }
    .game-end__stats { grid-template-columns: 1fr 1fr; gap: 12px; }
    .end-stat { padding: 16px; }
    .end-stat__value { font-size: 1.3rem; }

    /* Section */
    .section__header { margin-bottom: 40px; }

    /* Scores panel */
    .scores-panel { padding: 28px 20px; }

    /* CTA */
    .cta-banner { padding: 48px 24px; }
}

/* ── Mobile small ( ≤ 480px ) ───────────────── */
@media (max-width: 480px) {
    .container { width: 94%; }

    .hero__title { font-size: 2rem; }
    .hero__desc { font-size: 1rem; }
    .hero__actions { flex-direction: column; }
    .hero__actions .btn { width: 100%; }

    .btn--lg { padding: 16px 28px; font-size: 1rem; }

    .section__title { font-size: 1.7rem; }

    .game-card__meta { flex-direction: column; align-items: flex-start; gap: 10px; }
    .game-card__play { width: 100%; justify-content: center; }

    .game-end__actions { flex-direction: column; }
    .game-end__actions .btn { width: 100%; }
    .game-end__card { padding: 32px 24px; }
    .game-end__stats { grid-template-columns: 1fr; }

    .leaderboard__tabs { max-width: 100%; }

    .countdown-number { font-size: 5rem; }
}

/* ── Ultra-wide ( ≥ 1600px ) ────────────────── */
@media (min-width: 1600px) {
    :root {
        --container-width: 1400px;
    }
}

/* ── Reduced motion ─────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
    .bg-glow { display: none; }
    .reveal { opacity: 1; transform: none; }
}