/* ═══════════════════════════════════════════════════
   mobile-nav.css — Hamburger & responsive navbar
   ═══════════════════════════════════════════════════ */

/* Hamburger button — hidden on desktop */
.hamburger-btn {
    display: none;
    background: var(--bg-tertiary, var(--card));
    border: 1px solid var(--border);
    border-radius: 8px;
    width: 44px;
    height: 44px;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 0;
    transition: all 0.2s;
    flex-shrink: 0;
}

.hamburger-btn:hover {
    background: var(--bg-hover, rgba(99, 102, 241, 0.1));
    border-color: var(--primary, #6366f1);
}

.hamburger-btn .bar {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-primary, #f1f5f9);
    border-radius: 2px;
    transition: all 0.28s ease;
    transform-origin: center;
}

/* ☰ → ✕ */
.hamburger-btn.is-open .bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger-btn.is-open .bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger-btn.is-open .bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Overlay */
#mobile-nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1040;
    background: rgba(0, 0, 0, 0.3);
    /* Must not cover the navbar — navbar sits above at z-index 1060 */
}

#mobile-nav-overlay.active {
    display: block;
}

/* Drawer lang wrap — hidden on desktop */
.drawer-lang-wrap {
    display: none;
}

/* Drawer admin links — hidden on desktop (shown only in drawer) */
.drawer-admin-links {
    display: none;
}

/* ═══════════════════════════════════════════════════
   MOBILE  ≤ 1024px  (covers tablets + phones)
   ═══════════════════════════════════════════════════ */
@media (max-width: 1024px) {

    /* Navbar above overlay (1040) — hamburger stays clickable when drawer is open */
    .navbar {
        z-index: 1060 !important;
    }

    .hamburger-btn {
        display: flex;
    }

    /* Single strict row */
    .navbar-inner {
        padding: 0 1rem;
        height: 60px;
        gap: 0.4rem;
        flex-wrap: nowrap;
        align-items: center;
    }

    /* Brand left */
    .brand {
        flex: 1 1 auto;
        min-width: 0;
        font-size: 1rem;
    }

    .logo {
        font-size: 1.2rem;
    }

    .brand-text {
        font-size: 1rem;
    }

    /* Actions right — compact */
    .nav-actions {
        flex: 0 0 auto;
        gap: 0.4rem;
        align-items: center;
        flex-wrap: nowrap;
    }

    /* Hide lang toggle from top bar */
    .lang-toggle-topbar {
        display: none !important;
    }

    /* Shrink all action buttons */
    .theme-toggle {
        width: 36px;
        height: 36px;
        padding: 0;
        font-size: 1rem;
        flex-shrink: 0;
    }

    .hamburger-btn {
        width: 40px;
        height: 40px;
        flex-shrink: 0;
    }

    .btn-login {
        padding: 0.4rem 0.9rem;
        font-size: 0.82rem;
        white-space: nowrap;
        flex-shrink: 0;
    }

    .user-avatar {
        width: 34px !important;
        height: 34px !important;
        font-size: 0.82rem !important;
        flex-shrink: 0 !important;
    }

    /* Hide desktop nav links */
    .nav-links {
        display: none !important;
    }

    /* Drawer — fixed, full width below navbar */
    .nav-links.mobile-open {
        display: flex !important;
        flex-direction: column;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        gap: 2px;
        padding: 0.75rem;
        background: var(--bg-secondary, #1e293b);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
        z-index: 1050;
        animation: cmSlideDown 0.2s ease;
        max-height: calc(100vh - 60px);
        overflow-y: auto;
    }

    .nav-links a {
        padding: 0.75rem 1rem;
        border-radius: 8px;
        font-size: 0.95rem;
        color: var(--text-secondary, #cbd5e1);
        text-decoration: none;
        transition: background 0.15s, color 0.15s;
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }

    .nav-links a:hover,
    .nav-links a.active {
        background: rgba(99, 102, 241, 0.12);
        color: var(--primary, #6366f1);
    }

    /* Hide the desktop admin dropdown entirely in mobile */
    .nav-dropdown-wrap {
        display: none;
    }

    /* Admin/Teacher links shown directly in drawer */
    .drawer-admin-links {
        display: flex;
        flex-direction: column;
        gap: 2px;
        padding-top: 0.5rem;
        margin-top: 0.25rem;
        border-top: 1px solid var(--border);
    }

    .drawer-admin-links a {
        padding: 0.75rem 1rem;
        border-radius: 8px;
        font-size: 0.95rem;
        color: var(--text-secondary, #cbd5e1);
        text-decoration: none;
        display: flex;
        align-items: center;
        gap: 0.5rem;
        transition: background 0.15s, color 0.15s;
    }

    .drawer-admin-links a:hover {
        background: rgba(99, 102, 241, 0.12);
        color: var(--primary, #6366f1);
    }

    .drawer-admin-label {
        padding: 0.4rem 1rem 0.2rem;
        font-size: 0.72rem;
        font-weight: 700;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: var(--text-muted, #64748b);
    }

    /* Lang toggle at bottom of drawer */
    .drawer-lang-wrap {
        display: block;
        padding-top: 0.75rem;
        margin-top: 0.25rem;
        border-top: 1px solid var(--border);
    }

    .drawer-lang-wrap .lang-toggle {
        height: 40px;
        width: auto;
    }
}

@keyframes cmSlideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }

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

/* ═══════════════════════════════════════════════════
   HOMEPAGE — Mobile fixes
   ═══════════════════════════════════════════════════ */

/* Hide rotating code block on mobile — useless on small screens */
@media (max-width: 1024px) {
    .cta-visual {
        display: none !important;
    }

    /* CTA section: single column, centered */
    .cta-section {
        display: block !important;
        text-align: center;
        padding: 3rem 1.5rem;
    }

    .cta-actions {
        justify-content: center;
        flex-wrap: wrap;
    }
}

/* Hero section — prevent horizontal overflow from floating symbols */
@media (max-width: 768px) {
    .hero {
        overflow: hidden;
        padding: 2.5rem 1rem 2rem;
    }

    /* Hide floating symbols — they bleed out of viewport */
    .floating-symbols {
        display: none;
    }

    /* Hero title smaller */
    .hero-title {
        font-size: clamp(1.8rem, 7vw, 2.8rem) !important;
    }

    /* Stats: 3 in a row on mobile */
    .hero-stats {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem 2rem;
    }

    /* Sections padding */
    .languages-section {
        padding: 3rem 1rem;
    }

    /* Availability note */
    .availability-note {
        margin: 0 1rem 1.5rem;
    }
}

/* Global mobile overflow prevention */
@media (max-width: 1024px) {
    .main-container {
        overflow-x: hidden;
        max-width: 100vw;
    }
}

/* ═══════════════════════════════════════════════════
   LEADERBOARD — Mobile fixes
   ═══════════════════════════════════════════════════ */
@media (max-width: 640px) {

    /* Podium cards — better avatar */
    .podium-avatar,
    .podium-first .podium-avatar {
        width: 48px !important;
        height: 48px !important;
        font-size: 18px !important;
        border-width: 2px !important;
        flex-shrink: 0;
    }

    .podium-first .podium-avatar {
        background: linear-gradient(135deg, rgba(234, 179, 8, 0.35), rgba(245, 158, 11, 0.35)) !important;
        border-color: rgba(234, 179, 8, 0.5) !important;
        box-shadow: 0 0 12px rgba(234, 179, 8, 0.25);
    }

    /* Table row avatar — bigger and cleaner */
    .row-avatar {
        width: 36px !important;
        height: 36px !important;
        font-size: 13px !important;
        border-radius: 10px !important;
        background: linear-gradient(135deg, rgba(99, 102, 241, 0.25), rgba(139, 92, 246, 0.25)) !important;
        border: 1.5px solid rgba(99, 102, 241, 0.3) !important;
    }

    /* Tighten podium card layout on mobile */
    .podium-card,
    .podium-first {
        padding: 12px 14px !important;
        border-radius: 14px !important;
        gap: 10px !important;
    }

    .podium-medal {
        font-size: 1.4rem !important;
    }

    .podium-name {
        font-size: 0.88rem !important;
    }

    .podium-score {
        font-size: 1rem !important;
    }

    .podium-detail {
        font-size: 0.68rem !important;
    }
}

/* ═══════════════════════════════════════════════════
   STATS — Weekly chart overflow fix
   ═══════════════════════════════════════════════════ */
@media (max-width: 768px) {

    /* Wrap chart in scrollable container */
    .weekly-chart {
        overflow-x: auto !important;
        overflow-y: hidden !important;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 4px;
        /* Prevent squishing — each bar gets minimum width */
        min-width: 0;
    }

    /* Each bar column: fixed minimum width so labels fit */
    .bar-col {
        flex: 0 0 40px !important;
        min-width: 40px !important;
    }

    .bar {
        max-width: 28px !important;
    }

    .bar-label {
        font-size: 0.52rem !important;
        width: 100%;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    /* Heatmap also scrollable on small screens */
    .heatmap-wrapper {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    /* Stats card padding tighter */
    .stats-card {
        padding: 14px;
        border-radius: 14px;
    }

    /* Summary cards — 2 per row */
    .summary-row {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 8px;
    }

    .summary-value {
        font-size: 1.1rem;
    }

    .summary-label {
        font-size: 0.62rem;
    }
}

/* ═══════════════════════════════════════════════════
   ADMIN Users table — mobile card layout
   ═══════════════════════════════════════════════════ */
@media (max-width: 768px) {

    .admin-container {
        padding: 16px 12px;
    }

    /* Make table scroll horizontally */
    .admin-table-card {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        border-radius: 12px;
    }

    .admin-table {
        min-width: 520px;
        /* ensures all columns stay visible */
    }

    .admin-table th,
    .admin-table td {
        padding: 10px 8px;
        font-size: 0.82rem;
        white-space: nowrap;
    }

    .role-select {
        font-size: 0.8rem;
        padding: 6px 8px;
    }

    .btn-small {
        font-size: 0.75rem;
        padding: 5px 10px;
    }

    .role-form {
        gap: 6px;
    }
}

/* ═══════════════════════════════════════════════════
   ANALYTICS — Mobile fixes
   ═══════════════════════════════════════════════════ */
@media (max-width: 768px) {

    /* Table — horizontal scroll */
    .analytics-table-wrap {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .analytics-table {
        min-width: 480px;
    }

    .analytics-table th,
    .analytics-table td {
        padding: 8px 10px;
        font-size: 0.8rem;
        white-space: nowrap;
    }

    /* Charts — stack vertically, each scrollable */
    .analytics-charts {
        grid-template-columns: 1fr !important;
    }

    /* Daily bar chart — scrollable */
    .bar-chart {
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 4px;
    }

    .bar-chart .bar-col {
        flex: 0 0 18px !important;
        min-width: 18px !important;
    }

    /* Weekly stacked chart — scrollable */
    .weekly-bars {
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 4px;
    }

    .weekly-col {
        flex: 0 0 44px !important;
        min-width: 44px !important;
    }

    .weekly-label {
        font-size: 0.55rem !important;
    }

    /* Cards */
    .analytics-card {
        padding: 14px;
        border-radius: 14px;
    }

    /* Summary */
    .analytics-summary {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 8px;
    }
}