/**
 * base.css — CSS variables, reset, and base layout
 */

:root {
    /* ── Chess Neon Theme ──────────────────────────────────────────────────── */
    --mc-back-color: var(--ch-player);
    --mc-back-glow: 0 0 8px var(--ch-player);
    --ch-bg: #0a0612;
    --ch-board-dark: #1a0a2a;
    --ch-board-light: #2a1a3a;
    --ch-board-border: #00f5ff;
    --ch-player: #00f5ff;
    --ch-player-glow: rgba(0,245,255,0.6);
    --ch-ai: #ff2d78;
    --ch-ai-glow: rgba(255,45,120,0.6);
    --ch-highlight: #39ff6e;
    --ch-highlight-glow: rgba(57,255,110,0.5);
    --ch-last-move: #ffe03a;
    --ch-last-move-glow: rgba(255,224,58,0.4);
    --ch-check: #ff3d3d;
    --ch-check-glow: rgba(255,61,61,0.6);
    --ch-text: #f0ead8;
    --ch-text-dim: #8a7fa8;
    --ch-selected: #ffffff;
    --ch-selected-glow: rgba(255,255,255,0.8);
}

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

body {
    background: var(--ch-bg);
    color: var(--ch-text);
    font-family: 'Press Start 2P', monospace;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ── Container ──────────────────────────────────────────────────────────────── */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 60px 20px 40px;
}

/* ── Start Screen ───────────────────────────────────────────────────────────── */
.start-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
    text-align: center;
}

.start-content {
    max-width: 500px;
}

.game-title {
    font-size: clamp(24px, 5vw, 40px);
    color: var(--ch-player);
    text-shadow: 0 0 20px var(--ch-player-glow);
    margin-bottom: 20px;
    line-height: 1.3;
}

.game-subtitle {
    font-size: 10px;
    color: var(--ch-text-dim);
    margin-bottom: 30px;
    letter-spacing: 0.1em;
}

.start-divider {
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--ch-player), transparent);
    margin: 20px 0;
}

.start-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 30px;
}

.start-btn {
    background: transparent;
    border: 2px solid var(--ch-player);
    color: var(--ch-player);
    font-family: 'Press Start 2P', monospace;
    font-size: 10px;
    padding: 12px 24px;
    cursor: pointer;
    transition: all 0.15s;
    letter-spacing: 0.05em;
}

.start-btn:hover {
    background: var(--ch-player);
    color: var(--ch-bg);
    box-shadow: 0 0 20px var(--ch-player-glow);
}

.start-btn.primary {
    background: var(--ch-player);
    color: var(--ch-bg);
}

.start-btn.primary:hover {
    background: #ffffff;
    box-shadow: 0 0 30px var(--ch-player-glow);
}

.start-footer {
    font-size: 8px;
    color: var(--ch-text-dim);
    line-height: 1.8;
}

/* ── Game Screen ────────────────────────────────────────────────────────────── */
.game-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.game-header {
    text-align: center;
    width: 100%;
}

.game-header h1 {
    font-size: 16px;
    color: var(--ch-player);
    text-shadow: 0 0 10px var(--ch-player-glow);
    margin-bottom: 10px;
}

.game-stats {
    display: flex;
    gap: 30px;
    justify-content: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-label {
    font-size: 8px;
    color: var(--ch-text-dim);
}

.stat-value {
    font-size: 14px;
    color: var(--ch-highlight);
    text-shadow: 0 0 8px var(--ch-highlight-glow);
}

/* ── Game Layout ────────────────────────────────────────────────────────────── */
.game-layout {
    display: flex;
    gap: 15px;
    align-items: flex-start;
    width: 100%;
    justify-content: center;
}

/* ── Board Area ─────────────────────────────────────────────────────────────── */
.board-area {
    position: relative;
    flex-shrink: 0;
}

/* ── Side Panel ─────────────────────────────────────────────────────────────── */
.side-panel {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 180px;
    max-width: 240px;
    flex: 1;
}

/* ── Message Area ───────────────────────────────────────────────────────────── */
.message-area {
    text-align: center;
    min-height: 25px;
}

.game-message {
    font-size: 10px;
    color: var(--ch-highlight);
    text-shadow: 0 0 8px var(--ch-highlight-glow);
}

.game-message.check {
    color: var(--ch-check);
    text-shadow: 0 0 8px var(--ch-check-glow);
}

/* ── Timer ──────────────────────────────────────────────────────────────────── */
.timer-container {
    display: flex;
    justify-content: space-between;
    width: 100%;
    max-width: 500px;
}

.timer {
    font-size: 12px;
    padding: 8px 12px;
    border-radius: 4px;
    border: 1px solid var(--ch-text-dim);
}

.timer.player {
    color: var(--ch-player);
}

.timer.ai {
    color: var(--ch-ai);
}

.timer.active {
    border-color: var(--ch-highlight);
    box-shadow: 0 0 8px var(--ch-highlight-glow);
}

/* ── Controls ───────────────────────────────────────────────────────────────── */
.game-controls {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.control-btn {
    background: transparent;
    border: 1px solid var(--ch-text-dim);
    color: var(--ch-text-dim);
    font-family: 'Press Start 2P', monospace;
    font-size: 8px;
    padding: 8px 16px;
    cursor: pointer;
    transition: all 0.15s;
}

.control-btn:hover {
    border-color: var(--ch-player);
    color: var(--ch-player);
}

/* ── CRT Scanlines ──────────────────────────────────────────────────────────── */
.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.15) 0px,
        rgba(0, 0, 0, 0.15) 1px,
        transparent 1px,
        transparent 3px
    );
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}