/* CSS Variables */
:root {
    --bg-dark: #0a0a0f;
    --bg-panel: #12121a;
    --bg-board: #080810;
    --border-color: #2a2a3a;
    --text-primary: #e0e0e0;
    --text-dim: #6a6a7a;
    --accent-human: #ff3366;
    --accent-human-glow: rgba(255, 51, 102, 0.5);
    --accent-machine: #00ffcc;
    --accent-machine-glow: rgba(0, 255, 204, 0.5);
    --accent-warning: #ffcc00;
    --grid-line: rgba(255, 255, 255, 0.03);
    
    /* Tetris piece colors */
    --piece-I: #00f5ff;
    --piece-O: #ffd700;
    --piece-T: #9d4edd;
    --piece-S: #39ff14;
    --piece-Z: #ff3131;
    --piece-J: #4169e1;
    --piece-L: #ff8c00;
}

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

body {
    font-family: 'Share Tech Mono', monospace;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    background-image: 
        radial-gradient(ellipse at 50% 0%, rgba(100, 50, 150, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 0% 50%, rgba(50, 100, 150, 0.1) 0%, transparent 40%),
        radial-gradient(ellipse at 100% 50%, rgba(150, 50, 100, 0.1) 0%, transparent 40%);
}

/* CRT Scanlines Effect */
.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.1) 0px,
        rgba(0, 0, 0, 0.1) 1px,
        transparent 1px,
        transparent 3px
    );
}

.game-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
}

/* Header */
.game-header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px 0;
}

.title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    letter-spacing: 0.2em;
    background: linear-gradient(135deg, var(--accent-human) 0%, var(--accent-machine) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 60px var(--accent-human-glow);
    animation: title-glow 3s ease-in-out infinite alternate;
}

.dash {
    color: var(--accent-warning);
    -webkit-text-fill-color: var(--accent-warning);
    animation: dash-blink 1s ease-in-out infinite;
}

@keyframes title-glow {
    0% { filter: drop-shadow(0 0 20px var(--accent-human-glow)); }
    100% { filter: drop-shadow(0 0 40px var(--accent-machine-glow)); }
}

@keyframes dash-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.subtitle {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.9rem;
    letter-spacing: 0.5em;
    color: var(--text-dim);
    margin-top: 10px;
}

/* Game Layout */
.game-layout {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 30px;
    align-items: start;
}

@media (max-width: 1000px) {
    .game-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .player-panel {
        order: 1;
    }
    
    .game-main {
        order: 0;
    }
}

/* Player Panels */
.player-panel {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h2 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.1rem;
    letter-spacing: 0.2em;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.human-indicator {
    background: var(--accent-human);
    box-shadow: 0 0 10px var(--accent-human-glow);
}

.machine-indicator {
    background: var(--accent-machine);
    box-shadow: 0 0 10px var(--accent-machine-glow);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.7; }
}

.human-panel .panel-header {
    background: linear-gradient(90deg, rgba(255, 51, 102, 0.1) 0%, transparent 100%);
}

.machine-panel .panel-header {
    background: linear-gradient(90deg, transparent 0%, rgba(0, 255, 204, 0.1) 100%);
}

.panel-content {
    padding: 20px;
}

.role-text {
    color: var(--text-dim);
    font-size: 0.75rem;
    letter-spacing: 0.3em;
    margin-bottom: 20px;
}

.score-display, .ai-status {
    margin-bottom: 15px;
}

.score-label, .ai-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 0.2em;
    margin-bottom: 5px;
}

.score-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 2rem;
    font-weight: 700;
}

.human-panel .score-value {
    color: var(--accent-human);
}

.machine-panel .score-value {
    color: var(--accent-machine);
}

.ai-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.9rem;
    color: var(--accent-machine);
}

.threshold-label {
    font-size: 0.7rem;
    color: var(--accent-warning);
    letter-spacing: 0.1em;
    display: block;
    margin-top: 4px;
}

.speed-display {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.speed-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 0.2em;
    margin-bottom: 8px;
}

.speed-bar-container {
    width: 100%;
    height: 8px;
    background: var(--bg-dark);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.speed-bar {
    height: 100%;
    width: 10%;
    background: linear-gradient(90deg, var(--accent-machine) 0%, var(--accent-warning) 50%, var(--accent-human) 100%);
    border-radius: 4px;
    transition: width 0.3s ease;
    box-shadow: 0 0 10px var(--accent-machine-glow);
}

.speed-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-machine);
}

/* Game Main */
.game-main {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 25px;
}

/* Board */
.board-container {
    position: relative;
}

.board-frame {
    position: relative;
    padding: 4px;
    background: linear-gradient(135deg, var(--accent-human) 0%, var(--accent-machine) 100%);
    border-radius: 4px;
}

#game-board {
    display: block;
    background: var(--bg-board);
    border-radius: 2px;
}

.board-glow {
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: radial-gradient(ellipse at center, rgba(100, 100, 200, 0.1) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

/* Piece Selector */
.piece-selector {
    width: 100%;
    max-width: 500px;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
}

.selector-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.8rem;
    letter-spacing: 0.3em;
    color: var(--text-dim);
    text-align: center;
    margin-bottom: 15px;
}

.pieces-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 10px;
}

.piece-btn {
    aspect-ratio: 1;
    background: var(--bg-dark);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
}

.piece-btn:hover {
    border-color: var(--accent-human);
    transform: translateY(-3px);
    box-shadow: 0 5px 20px var(--accent-human-glow);
}

.piece-btn.selected {
    border-color: var(--accent-human);
    background: rgba(255, 51, 102, 0.1);
    box-shadow: 0 0 20px var(--accent-human-glow);
}

.piece-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

.piece-btn.cooldown {
    opacity: 0.3;
    border-color: var(--accent-warning);
    background: rgba(255, 204, 0, 0.05);
    position: relative;
}

.piece-btn.cooldown::after {
    content: '⏳';
    position: absolute;
    top: 2px;
    right: 2px;
    font-size: 0.7rem;
}

.piece-btn canvas {
    width: 100%;
    height: 100%;
}

/* Buttons */
.game-controls {
    display: flex;
    gap: 15px;
}

.btn {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    padding: 15px 30px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
}

.btn-start {
    background: linear-gradient(135deg, var(--accent-human) 0%, #cc2952 100%);
    color: white;
    box-shadow: 0 4px 20px var(--accent-human-glow);
}

.btn-start:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px var(--accent-human-glow);
}

.btn-reset {
    background: var(--bg-dark);
    color: var(--text-dim);
    border: 1px solid var(--border-color);
}

.btn-reset:hover {
    border-color: var(--text-dim);
    color: var(--text-primary);
}

/* Game Status */
.game-status {
    padding: 15px 30px;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.status-text {
    font-size: 0.85rem;
    letter-spacing: 0.15em;
    color: var(--text-dim);
}

/* Game Overlay */
.game-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 15, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.game-overlay.active {
    display: flex;
    animation: overlay-fade-in 0.5s ease;
}

@keyframes overlay-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

.overlay-content {
    text-align: center;
    animation: overlay-slide-up 0.5s ease;
}

@keyframes overlay-slide-up {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.overlay-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: 0.2em;
    margin-bottom: 20px;
}

.overlay-title.human-wins {
    color: var(--accent-human);
    text-shadow: 0 0 40px var(--accent-human-glow);
}

.overlay-title.machine-wins {
    color: var(--accent-machine);
    text-shadow: 0 0 40px var(--accent-machine-glow);
}

.overlay-message {
    font-size: 1.1rem;
    color: var(--text-dim);
    margin-bottom: 40px;
    max-width: 400px;
}

.btn-play-again {
    background: linear-gradient(135deg, var(--accent-machine) 0%, #00ccaa 100%);
    color: var(--bg-dark);
    font-weight: 700;
    box-shadow: 0 4px 20px var(--accent-machine-glow);
}

.btn-play-again:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px var(--accent-machine-glow);
}

/* Piece drop animation */
@keyframes piece-drop {
    0% { opacity: 0.5; }
    100% { opacity: 1; }
}

.dropping {
    animation: piece-drop 0.3s ease-out;
}

/* Line clear animation */
@keyframes line-flash {
    0% { background: white; }
    100% { background: transparent; }
}

/* Responsive */
@media (max-width: 600px) {
    .game-container {
        padding: 10px;
    }
    
    .pieces-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .game-controls {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    #game-board {
        width: 100%;
        height: auto;
    }
}