/* ===== CHESS UI STYLES ===== */

/* Side Panel */
.side-panel {
    width: 280px; min-width: 240px;
    background: rgba(0,0,0,0.2);
    border-left: 1px solid var(--card-border);
    display: flex; flex-direction: column;
    overflow: hidden; gap: 0;
}
.mobile-panel-toggle { display: none; }

/* Status Panel */
.status-panel {
    padding: 16px 20px;
    border-bottom: 1px solid var(--card-border);
    background: rgba(0,0,0,0.2);
    text-align: center;
}
.status-label { font-size: 10px; color: var(--text-muted); letter-spacing: 2px; margin-bottom: 4px; }
.status-value { font-size: 18px; font-weight: 800; color: var(--accent); }
.move-count { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* Move History */
.move-history-panel {
    flex: 1; display: flex; flex-direction: column; overflow: hidden;
}
.panel-title {
    padding: 12px 20px 8px;
    font-size: 11px; font-weight: 700; letter-spacing: 2px;
    color: var(--text-muted); border-bottom: 1px solid var(--card-border);
}
.move-history {
    flex: 1; overflow-y: auto; padding: 8px 12px;
    font-family: monospace; font-size: 13px;
}
.move-history::-webkit-scrollbar { width: 4px; }
.move-history::-webkit-scrollbar-thumb { background: var(--card-border); border-radius: 2px; }
.move-row {
    display: flex; gap: 4px; padding: 3px 4px;
    border-radius: 4px; align-items: center;
}
.move-row:hover { background: rgba(255,255,255,0.05); }
.move-num { color: var(--text-muted); min-width: 28px; font-size: 12px; }
.move-white { color: var(--text-primary); min-width: 60px; }
.move-black { color: var(--text-secondary); min-width: 60px; }

/* Action Buttons */
.action-buttons {
    padding: 12px; display: flex; gap: 8px;
    border-top: 1px solid var(--card-border);
}
.action-buttons .btn { flex: 1; }

/* Main Menu */
#main-menu { position: relative; overflow: hidden; }
.menu-bg {
    position: absolute; inset: 0;
    background: radial-gradient(ellipse at center, #1a2634 0%, #0f1923 100%);
    overflow: hidden;
}
.menu-board-preview {
    position: absolute; inset: 0;
    opacity: 0.08;
    background-image:
        repeating-conic-gradient(#fff 0% 25%, transparent 0% 50%);
    background-size: 80px 80px;
}
.menu-overlay {
    position: absolute; inset: 0;
    background: radial-gradient(ellipse at center, transparent 30%, rgba(15,25,35,0.8) 100%);
}
.menu-content {
    position: relative; z-index: 1;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    height: 100%; padding: 24px; gap: 32px;
}
.menu-logo { text-align: center; }
.chess-icon {
    font-size: 80px; line-height: 1;
    filter: drop-shadow(0 0 20px rgba(201,168,76,0.5));
    animation: chessBob 3s ease-in-out infinite;
}
.menu-logo h1 {
    font-size: clamp(32px, 6vw, 56px); font-weight: 900;
    color: var(--accent); letter-spacing: 4px;
    text-shadow: 0 0 30px rgba(201,168,76,0.4);
    margin-top: 12px;
}
.tagline { color: var(--text-secondary); font-size: 15px; margin-top: 8px; letter-spacing: 1px; }
.menu-buttons { display: flex; flex-direction: column; gap: 12px; width: 100%; max-width: 320px; }
.menu-buttons .btn { width: 100%; font-size: 16px; padding: 14px 24px; }

/* Difficulty Cards */
.difficulty-cards { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.diff-card {
    background: var(--card-bg); border: 2px solid var(--card-border);
    border-radius: var(--radius); padding: 24px 20px;
    text-align: center; cursor: pointer; transition: all 0.2s ease;
    min-width: 140px; flex: 1; max-width: 180px;
}
.diff-card:hover { border-color: var(--accent); background: rgba(201,168,76,0.1); transform: translateY(-4px); }
.diff-icon { font-size: 36px; margin-bottom: 12px; }
.diff-name { font-size: 16px; font-weight: 800; color: var(--accent); letter-spacing: 1px; }
.diff-desc { font-size: 12px; color: var(--text-secondary); margin-top: 6px; }

/* Animations */
@keyframes chessBob {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.3s ease; }