/* ── Variables ─────────────────────────── */
:root {
    --primary:        #6366f1;
    --primary-dark:   #4f46e5;
    --bg-dark:        #0a0f1e;
    --glass-bg:       rgba(20, 30, 55, 0.80);
    --glass-border:   rgba(255, 255, 255, 0.10);
    --text:           #f8fafc;
    --text-dim:       #94a3b8;
    --text-soft:      #cbd5e1;
    --grad-a:         #38bdf8;
    --grad-b:         #818cf8;
    --gold:           #f59e0b;
    --bronze:         #b45309;
}

/* ── Reset ──────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-dark);
    background-image: radial-gradient(rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 40px 40px;
    color: var(--text);
    min-height: 100vh;
    padding: 1.5rem 1rem 3rem;
}

/* ── Background orbs ────────────────────── */
.background-animation {
    position: fixed; inset: -50%;
    width: 200%; height: 200%;
    background:
        radial-gradient(circle at 40% 60%, rgba(99,102,241,.18), transparent 40%),
        radial-gradient(circle at 72% 28%, rgba(56,189,248,.18), transparent 40%);
    animation: orb 25s infinite alternate ease-in-out;
    z-index: 0;
    pointer-events: none;
}
@keyframes orb {
    from { transform: scale(1)   translate(0,0); }
    to   { transform: scale(1.1) translate(-4%,-4%); }
}

/* ── Page layout ────────────────────────── */
.page-container {
    position: relative;
    z-index: 1;
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

/* ── Glass card ─────────────────────────── */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: 0 20px 50px -10px rgba(0,0,0,.5);
}

/* ── Header ─────────────────────────────── */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.1rem 1.75rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.brand h1 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -1px;
    line-height: 1;
}

.tagline {
    font-size: 0.82rem;
    color: var(--text-dim);
    margin-top: 0.15rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.username-bar {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    background: rgba(255,255,255,.06);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 0.35rem 0.8rem;
    font-size: 0.88rem;
}

.username-input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text);
    font-family: inherit;
    font-size: 0.88rem;
    font-weight: 600;
    width: 140px;
}
.username-input::placeholder { color: var(--text-dim); font-weight: 400; }

.class-badge {
    background: linear-gradient(135deg, rgba(56,189,248,.12), rgba(129,140,248,.12));
    border: 1px solid rgba(129,140,248,.3);
    color: var(--grad-b);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.3rem 0.85rem;
    border-radius: 99px;
    white-space: nowrap;
}

/* ── Draw section ───────────────────────── */
.draw-section {
    display: flex;
    gap: 1.25rem;
    padding: 1.5rem;
    align-items: flex-start;
}

.canvas-wrap { flex-shrink: 0; }

.canvas-container {
    background: #fff;
    border-radius: 16px;
    padding: 8px;
    box-shadow: inset 0 2px 8px rgba(0,0,0,.1), 0 8px 30px rgba(0,0,0,.35);
    position: relative;
    transition: box-shadow .3s, transform .3s;
    width: fit-content;
    margin: 0 auto;
}
.canvas-container:hover {
    transform: translateY(-2px);
    box-shadow: inset 0 2px 8px rgba(0,0,0,.1), 0 14px 40px rgba(99,102,241,.2);
}

canvas {
    display: block;
    border: 2px dashed #cbd5e1;
    border-radius: 10px;
    cursor: crosshair;
    background: #fff;
    touch-action: none;
    /* Dynamic: scales to container on small screens */
    width: min(360px, calc(100vw - 5rem));
    height: auto;
    aspect-ratio: 1;
}

.canvas-hint {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    color: #94a3b8;
    font-size: 1rem;
    font-weight: 500;
    opacity: .45;
    transition: opacity .3s;
    user-select: none;
}
.canvas-hint.hidden { opacity: 0; }

/* Side panel */
.side-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-width: 0;
}

/* Result box */
.result-box {
    flex: 1;
    padding: 1rem 1.2rem;
    border-radius: 14px;
    background: rgba(10,15,30,.6);
    border: 1px solid var(--glass-border);
    transition: all .3s;
}

.result-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-dim);
    margin-bottom: 0.85rem;
    text-align: center;
}

.top3-container { display: flex; flex-direction: column; gap: .5rem; }

.top3-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: 2rem 1rem;
    color: var(--text-dim);
    font-size: .9rem;
}
.placeholder-icon { font-size: 1.6rem; opacity: .4; }

/* Guess rows */
.guess-row {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: .5rem .65rem;
    border-radius: 9px;
    border: 1px solid transparent;
    animation: slideIn .25s ease both;
}
.guess-row.rank-1 { background: rgba(245,158,11,.08); border-color: rgba(245,158,11,.25); }
.guess-row.rank-2 { background: rgba(148,163,184,.06); border-color: rgba(148,163,184,.15); }
.guess-row.rank-3 { background: rgba(180,83,9,.06);   border-color: rgba(180,83,9,.15); }

.rank-badge { font-size: .95rem; width: 1.4rem; flex-shrink: 0; text-align: center; }

.guess-name {
    flex: 1; font-size: .9rem; font-weight: 600;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.guess-row.rank-1 .guess-name { font-size: 1rem; }

.guess-bar-wrap {
    flex: 2;
    background: rgba(255,255,255,.06);
    border-radius: 99px; height: 6px; overflow: hidden;
}
.guess-bar {
    height: 100%; border-radius: 99px;
    width: 0%;
    transition: width .5s cubic-bezier(.4,0,.2,1);
}
.rank-1 .guess-bar { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.rank-2 .guess-bar { background: linear-gradient(90deg, #6366f1, #818cf8); }
.rank-3 .guess-bar { background: linear-gradient(90deg, #b45309, #d97706); }

.guess-pct { font-size: .75rem; font-weight: 600; color: var(--text-dim); width: 2.8rem; text-align: right; flex-shrink: 0; }
.rank-1 .guess-pct { color: #f59e0b; }

@keyframes slideIn {
    from { opacity: 0; transform: translateY(5px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .5; } }
.loading .top3-container { animation: pulse .8s infinite; }

/* Action buttons */
.action-btns {
    display: flex;
    gap: .75rem;
}

/* ── Buttons ────────────────────────────── */
.btn {
    flex: 1;
    padding: .75rem 1.25rem;
    border: none;
    border-radius: 11px;
    font-size: .9rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: all .2s cubic-bezier(.4,0,.2,1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn.primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 14px rgba(99,102,241,.35);
}
.btn.primary:hover { box-shadow: 0 6px 20px rgba(99,102,241,.55); transform: translateY(-2px); }
.btn.primary:active { transform: translateY(0); }
.btn.secondary {
    background: rgba(255,255,255,.08);
    color: var(--text);
    border: 1px solid var(--glass-border);
}
.btn.secondary:hover { background: rgba(255,255,255,.14); transform: translateY(-2px); }
.btn.danger {
    background: rgba(239,68,68,.1);
    color: #ef4444;
    border: 1px solid rgba(239,68,68,.3);
}
.btn.danger:hover { background: rgba(239,68,68,.2); border-color: #ef4444; }

/* ── Bottom row ─────────────────────────── */
.bottom-row {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
}

/* ── Panel shared ───────────────────────── */
.leaderboard-panel,
.categories-panel {
    padding: 1.25rem 1.5rem;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    gap: .5rem;
    flex-wrap: wrap;
}

.panel-title {
    font-size: .9rem;
    font-weight: 700;
    letter-spacing: .01em;
}

/* ── Leaderboard panel ──────────────────── */
.leaderboard-panel {
    flex: 0 0 240px;
}

.filter-group { display: flex; gap: .35rem; }

.filter-btn {
    padding: .25rem .65rem;
    font-size: .75rem;
    font-weight: 600;
    border-radius: 7px;
    border: 1px solid var(--glass-border);
    background: rgba(255,255,255,.05);
    color: var(--text-dim);
    cursor: pointer;
    font-family: inherit;
    transition: all .2s;
}
.filter-btn:hover { background: rgba(255,255,255,.10); color: var(--text); }
.filter-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-color: transparent;
}

#leaderboardTable { width: 100%; border-collapse: collapse; }
#leaderboardTable thead tr { border-bottom: 1px solid var(--glass-border); }
#leaderboardTable th {
    padding: .4rem .5rem;
    font-size: .7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--text-dim);
    text-align: left;
}
.align-right { text-align: right !important; }
#leaderboardTable td {
    padding: .55rem .5rem;
    font-size: .85rem;
    border-bottom: 1px solid rgba(255,255,255,.04);
}
#leaderboardTable tbody tr:hover { background: rgba(255,255,255,.03); }

/* ── Categories panel ───────────────────── */
.categories-panel { flex: 1; min-width: 0; }

.count-badge {
    font-size: .72rem;
    font-weight: 700;
    color: var(--text-dim);
    background: rgba(255,255,255,.06);
    border: 1px solid var(--glass-border);
    padding: .2rem .65rem;
    border-radius: 99px;
}

/* Scrollable wrapper */
.classes-grid-scroll {
    max-height: 340px;
    overflow-y: auto;
    padding-right: 6px;
    /* Smooth scrolling */
    scroll-behavior: smooth;
}

/* Custom scrollbar */
.classes-grid-scroll::-webkit-scrollbar { width: 5px; }
.classes-grid-scroll::-webkit-scrollbar-track { background: rgba(255,255,255,.03); border-radius: 99px; }
.classes-grid-scroll::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: 99px; }
.classes-grid-scroll::-webkit-scrollbar-thumb:hover { background: var(--grad-a); }

.classes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(78px, 1fr));
    gap: .6rem;
}

.class-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .35rem;
    padding: .6rem .4rem;
    background: rgba(255,255,255,.04);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    cursor: default;
    transition: all .22s cubic-bezier(.25,.8,.25,1);
    min-width: 0;
}
.class-card:hover {
    transform: translateY(-3px) scale(1.04);
    background: rgba(255,255,255,.09);
    border-color: var(--grad-a);
    box-shadow: 0 6px 18px -4px rgba(56,189,248,.22);
}

.class-card img {
    width: 38px; height: 38px;
    object-fit: contain;
    filter: drop-shadow(0 2px 3px rgba(0,0,0,.3));
    transition: filter .22s;
}
.class-card:hover img { filter: drop-shadow(0 3px 7px rgba(56,189,248,.4)); }

.class-placeholder {
    width: 38px; height: 38px;
    border-radius: 8px;
    background: linear-gradient(135deg, rgba(99,102,241,.22), rgba(56,189,248,.22));
    border: 1px solid rgba(129,140,248,.2);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem; font-weight: 800; color: var(--grad-b);
}

.class-name {
    font-size: .65rem;
    font-weight: 500;
    color: var(--text-soft);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
}
.class-card:hover .class-name { color: var(--text); }

/* ── Game Mode Styles ────────────────────── */
.header-nav {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 1rem; width: 100%;
}
.nav-back {
    padding: .5rem 1rem; text-decoration: none;
    font-size: .9rem; display: inline-block;
}
.timer-settings {
    display: flex; align-items: center; gap: .5rem;
    background: rgba(15,23,42,.5); padding: .4rem .8rem;
    border-radius: 8px; border: 1px solid var(--glass-border); font-size: .9rem;
}
.pen-size-control {
    display: flex; align-items: center; gap: .5rem;
    background: rgba(15,23,42,.5); padding: .4rem .8rem;
    border-radius: 8px; border: 1px solid var(--glass-border); font-size: .9rem;
}
.pen-label { color: var(--text-dim); white-space: nowrap; }
.pen-slider {
    width: 90px; cursor: pointer; accent-color: var(--grad-a);
    vertical-align: middle;
}
.timer-input {
    width: 60px; background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--grad-b); padding: .2rem .5rem;
    border-radius: 4px; font-weight: 600;
    text-align: center; outline: none; font-family: inherit;
}
.game-stats {
    display: flex; justify-content: space-around; align-items: center;
    margin: 1rem 0; font-size: 1.1rem;
    background: rgba(255,255,255,.05); padding: .75rem; border-radius: 12px;
}
.game-challenge { text-align: center; margin-bottom: 2rem; }
.target-word { font-size: 1.8rem; font-weight: 800; margin-bottom: .5rem; }
.timer-display { font-size: 1.2rem; font-weight: 600; }
.countdown { font-size: 1.6rem; color: var(--grad-a); transition: color .3s; }
.highlight { color: var(--grad-a); font-weight: 600; }

.game-modal {
    position: absolute; inset: 0;
    background: rgba(15,23,42,.85); z-index: 50;
    display: flex; justify-content: center; align-items: center;
    border-radius: 20px; backdrop-filter: blur(5px);
}
.modal-content {
    background: var(--bg-dark); padding: 2.5rem;
    text-align: center; box-shadow: 0 0 40px rgba(99,102,241,.2);
    border-radius: 20px; border: 1px solid var(--glass-border);
}
.modal-content h2 {
    font-size: 2rem; margin-bottom: 1rem;
    background: linear-gradient(135deg, #f8fafc, #cbd5e1);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
}
.modal-content p { margin-bottom: 2rem; font-size: 1.1rem; color: #94a3b8; }
.modal-btn { width: 100%; font-size: 1.1rem; padding: .9rem; }
.game-controls { display: flex; gap: 1rem; width: 100%; }

/* ── Game page container ─────────────────── */
.container {
    width: 100%; max-width: 720px;
    padding: 2.5rem; z-index: 1;
    margin: 0 auto;
}

/* ── Responsive ─────────────────────────── */
@media (max-width: 640px) {
    .draw-section { flex-direction: column; align-items: center; }
    .side-panel { width: 100%; }
    .bottom-row { flex-direction: column; }
    .leaderboard-panel { flex: none; width: 100%; }
    canvas { width: min(320px, calc(100vw - 4rem)); }
    .classes-grid { grid-template-columns: repeat(auto-fill, minmax(64px, 1fr)); }
}

/* ── Fun: gradient logo glow ─────────────── */
.gradient-text {
    filter: drop-shadow(0 0 18px rgba(56,189,248,.35));
}

/* ── Game mode tag ───────────────────────── */
.game-mode-tag {
    font-size: 1rem;
    font-weight: 600;
    background: linear-gradient(135deg, rgba(56,189,248,.15), rgba(129,140,248,.15));
    border: 1px solid rgba(129,140,248,.3);
    color: var(--grad-b);
    padding: .2rem .75rem;
    border-radius: 99px;
    vertical-align: middle;
    margin-left: .4rem;
}

/* ── Mode selection buttons ──────────────── */
.mode-select {
    display: flex;
    gap: .75rem;
}

.mode-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .2rem;
    padding: .85rem .5rem;
    background: rgba(255,255,255,.05);
    border: 2px solid var(--glass-border);
    border-radius: 14px;
    cursor: pointer;
    font-family: inherit;
    transition: all .2s ease;
    color: var(--text-dim);
}

.mode-btn:hover {
    background: rgba(255,255,255,.09);
    border-color: var(--grad-b);
    color: var(--text);
    transform: translateY(-2px);
}

.mode-btn.active {
    background: linear-gradient(135deg, rgba(99,102,241,.2), rgba(56,189,248,.2));
    border-color: var(--grad-a);
    color: var(--text);
    box-shadow: 0 4px 16px rgba(56,189,248,.2);
}

.mode-icon { font-size: 1.5rem; }
.mode-name { font-size: .9rem; font-weight: 700; }
.mode-desc { font-size: .72rem; color: var(--text-dim); }
.mode-btn.active .mode-desc { color: var(--grad-a); }

/* ── Mode tabs (leaderboard) ─────────────── */
.mode-tabs {
    display: flex;
    gap: .35rem;
}

.mode-tab {
    padding: .28rem .75rem;
    font-size: .78rem;
    font-weight: 700;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: rgba(255,255,255,.05);
    color: var(--text-dim);
    cursor: pointer;
    font-family: inherit;
    transition: all .2s;
}
.mode-tab:hover { background: rgba(255,255,255,.1); color: var(--text); }
.mode-tab.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-color: transparent;
}

/* ── Leaderboard section (game page) ─────── */
.leaderboard-section {
    margin-top: 2rem;
    padding: 1.25rem 1.5rem;
}

/* ── Win / Fail text ─────────────────────── */
.win-text {
    background: linear-gradient(135deg, #22c55e, #4ade80);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

.fail-text { color: #f87171; font-weight: 700; }

/* ── Score pop animation ─────────────────── */
@keyframes scorePop {
    0%   { transform: scale(1); }
    40%  { transform: scale(1.6); color: #4ade80; }
    100% { transform: scale(1); }
}
.score-pop-anim { animation: scorePop .4s cubic-bezier(.36,.07,.19,.97) both; }

/* ── Confetti ────────────────────────────── */
.confetti-container {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 999;
    overflow: hidden;
}

@keyframes confettiFall {
    0%   { transform: translateY(-20px) rotate(0deg); opacity: 1; }
    100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

.confetti-piece {
    position: absolute;
    top: 0;
    animation: confettiFall linear forwards;
}

/* ── Modal buttons row ───────────────────── */
.modal-buttons {
    display: flex;
    gap: .75rem;
    width: 100%;
    flex-wrap: wrap;
}