/* ═══════════════════════════════════════
   大老二 - Big Two Card Game Styles
   ═══════════════════════════════════════ */

:root {
    --table-bg: #1a6b3c;
    --table-border: #0d4a26;
    --card-w: 52px;
    --card-h: 74px;
    --card-sm-w: 36px;
    --card-sm-h: 52px;
    --accent: #f1c40f;
    --danger: #e74c3c;
    --success: #27ae60;
    --info: #3498db;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Segoe UI', 'Microsoft JhengHei', sans-serif;
    background: #0d1117;
    color: #e6e6e6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ─── Lobby ─── */
#lobby {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}
.lobby-box {
    background: #161b22;
    border: 1px solid #30363d;
    border-radius: 16px;
    padding: 40px;
    max-width: 440px;
    width: 100%;
    text-align: center;
}
.lobby-box h1 {
    font-size: 2.4rem;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--accent), #e67e22);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.lobby-box p.sub {
    color: #8b949e;
    margin-bottom: 24px;
    font-size: 0.95rem;
}
.lobby-box input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #30363d;
    border-radius: 8px;
    background: #0d1117;
    color: #e6e6e6;
    font-size: 1rem;
    margin-bottom: 12px;
    outline: none;
    transition: border-color .2s;
}
.lobby-box input:focus {
    border-color: var(--accent);
}
.lobby-box input::placeholder { color: #484f58; }

.btn-row {
    display: flex;
    gap: 10px;
    margin-top: 8px;
}
.btn {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform .1s, filter .15s;
}
.btn:active { transform: scale(0.96); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary   { background: var(--accent); color: #1a1a1a; }
.btn-secondary { background: #30363d; color: #e6e6e6; }
.btn-danger    { background: var(--danger); color: #fff; }
.btn-success   { background: var(--success); color: #fff; }
.btn-solo      { background: linear-gradient(135deg, #8b5cf6, #6366f1); color: #fff; }
.btn:hover:not(:disabled) { filter: brightness(1.1); }

.room-code {
    display: inline-block;
    background: #0d1117;
    border: 2px dashed var(--accent);
    padding: 8px 24px;
    border-radius: 8px;
    font-size: 1.6rem;
    font-weight: bold;
    letter-spacing: 4px;
    color: var(--accent);
    margin: 12px 0;
    user-select: all;
}
.status-msg {
    color: #8b949e;
    margin-top: 12px;
    font-size: 0.9rem;
}

/* ─── Game Table ─── */
#game-area {
    display: none;
    flex-direction: column;
    min-height: 100vh;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: #161b22;
    border-bottom: 1px solid #30363d;
    font-size: 0.85rem;
}
.game-header .room-label {
    color: var(--accent);
    font-weight: bold;
    letter-spacing: 2px;
}

.game-table {
    flex: 1;
    display: flex;
    flex-direction: column;
    background:
        radial-gradient(ellipse at center, #1e8449 0%, var(--table-bg) 50%, #145a2e 100%);
    border: 4px solid var(--table-border);
    margin: 8px;
    border-radius: 20px;
    overflow: hidden;
    position: relative;
}

/* ── Opponents ── */
.opponents-area {
    display: flex;
    justify-content: space-around;
    padding: 12px 16px 4px;
    flex-wrap: wrap;
    gap: 8px;
}
.opponent {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    min-width: 80px;
}
.opponent .name-tag {
    font-size: 0.8rem;
    padding: 2px 10px;
    border-radius: 12px;
    background: rgba(0,0,0,0.4);
    color: #ccc;
    white-space: nowrap;
}
.opponent .name-tag.active-turn {
    background: var(--accent);
    color: #1a1a1a;
    animation: pulse 1.2s infinite;
}
.opponent .name-tag.finished {
    background: #555;
    color: #999;
    text-decoration: line-through;
}
.opponent-cards {
    display: flex;
    gap: 1px;
}

/* ── Center Play Area ── */
.center-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 12px;
    min-height: 160px;
}
.center-label {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.5);
    margin-bottom: 6px;
}
.center-cards {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    justify-content: center;
}
.center-info {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.7);
    margin-top: 6px;
}
.turn-msg {
    font-size: 1.1rem;
    font-weight: bold;
    margin-top: 8px;
    padding: 6px 20px;
    border-radius: 20px;
}
.turn-msg.my-turn {
    background: var(--accent);
    color: #1a1a1a;
    animation: pulse 1.2s infinite;
}
.turn-msg.waiting {
    background: rgba(0,0,0,0.35);
    color: #aaa;
}
.free-play-hint {
    font-size: 0.8rem;
    color: #2ecc71;
    margin-top: 4px;
}

/* ── Game Log ── */
.game-log {
    max-height: 90px;
    overflow-y: auto;
    padding: 6px 16px;
    background: rgba(0,0,0,0.25);
    border-top: 1px solid rgba(255,255,255,0.08);
    font-size: 0.78rem;
    color: rgba(255,255,255,0.6);
}
.game-log::-webkit-scrollbar { width: 4px; }
.game-log::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 2px; }
.log-entry { padding: 2px 0; }
.log-entry .log-name { color: var(--accent); font-weight: 600; }
.log-entry .log-pass { color: #e74c3c; }

/* ── My Hand ── */
.my-hand-area {
    padding: 8px 12px 12px;
    background: rgba(0,0,0,0.3);
    border-top: 1px solid rgba(255,255,255,0.1);
}
.my-hand-label {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.5);
    margin-bottom: 6px;
    text-align: center;
}
.my-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 3px;
    justify-content: center;
    padding-bottom: 4px;
}

.action-bar {
    display: flex;
    gap: 10px;
    justify-content: center;
    padding: 8px 16px 12px;
    background: #161b22;
}
.action-bar .btn {
    min-width: 120px;
    padding: 10px 24px;
    font-size: 1.05rem;
}

/* ══ Card Styles ══ */
.card {
    width: var(--card-w);
    height: var(--card-h);
    border-radius: 6px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    user-select: none;
    transition: transform .12s, box-shadow .12s;
    position: relative;
    flex-shrink: 0;
}

.card-face {
    background: #fff;
    border: 1.5px solid #bbb;
    cursor: pointer;
    box-shadow: 1px 2px 4px rgba(0,0,0,0.25);
}
.card-face:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.3);
}
.card-face.selected {
    transform: translateY(-14px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.35);
    border-color: var(--accent);
    outline: 2px solid var(--accent);
}

.card-face .card-rank {
    font-size: 1.05rem;
    line-height: 1;
}
.card-face .card-suit {
    font-size: 1.1rem;
    line-height: 1;
    margin-top: 1px;
}

.card-face.red  { color: #d63031; }
.card-face.black { color: #2d3436; }

/* Card back */
.card-back {
    background:
        repeating-linear-gradient(
            45deg,
            transparent, transparent 4px,
            rgba(255,255,255,0.06) 4px, rgba(255,255,255,0.06) 8px
        ),
        linear-gradient(135deg, #1a1a2e, #16213e, #0f3460);
    border: 2px solid #e94560;
    box-shadow: 1px 2px 4px rgba(0,0,0,0.3);
}
.card-back::after {
    content: '🂠';
    font-size: 1.5rem;
    opacity: 0.4;
}

/* Small card (opponents) */
.card-sm {
    width: var(--card-sm-w);
    height: var(--card-sm-h);
}
.card-sm.card-back::after {
    font-size: 1.1rem;
}

/* Center played cards are normal size */
.center-cards .card {
    width: var(--card-w);
    height: var(--card-h);
}

/* ── Winner Overlay ── */
.winner-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.75);
    z-index: 100;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}
.winner-overlay.show {
    display: flex;
}
.winner-text {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--accent);
    text-shadow: 0 0 30px rgba(241,196,15,0.5);
    margin-bottom: 20px;
}
.winner-sub {
    font-size: 1.1rem;
    color: #ccc;
    margin-bottom: 24px;
}

/* ── Error Toast ── */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: var(--danger);
    color: #fff;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 0.95rem;
    z-index: 200;
    opacity: 0;
    transition: transform .3s, opacity .3s;
    pointer-events: none;
    max-width: 90%;
    text-align: center;
}
.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ── Animations ── */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* ── Responsive ── */
@media (max-width: 600px) {
    :root {
        --card-w: 42px;
        --card-h: 60px;
        --card-sm-w: 28px;
        --card-sm-h: 40px;
    }
    .lobby-box { padding: 24px 20px; }
    .lobby-box h1 { font-size: 1.8rem; }
    .opponents-area { padding: 8px 8px 2px; }
    .center-area { min-height: 120px; padding: 8px; }
    .my-cards { gap: 2px; }
    .action-bar .btn { min-width: 90px; padding: 8px 16px; font-size: 0.95rem; }
    .game-log { max-height: 60px; font-size: 0.72rem; }
    .turn-msg { font-size: 0.9rem; }
    .winner-text { font-size: 1.8rem; }
    .card-face .card-rank { font-size: 0.85rem; }
    .card-face .card-suit { font-size: 0.9rem; }
}

@media (max-width: 380px) {
    :root {
        --card-w: 36px;
        --card-h: 52px;
        --card-sm-w: 24px;
        --card-sm-h: 36px;
    }
}