:root {
    --bg-color: #0a0a12;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-highlight: rgba(255, 255, 255, 0.2);
    --neon-blue: #00f3ff;
    --neon-pink: #ff00ff;
    --neon-purple: #bc13fe;
    --neon-green: #0aff0a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --font-main: 'Outfit', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at 50% 50%, #1a1a2e 0%, #0a0a12 100%);
}

.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 600px;
    padding: 10px;
}

.game-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    position: relative;
}

.game-header h1 {
    font-weight: 700;
    letter-spacing: 2px;
    text-shadow: 0 0 10px var(--neon-purple);
    font-size: 2rem;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
    z-index: 10;
}

.back-btn:hover {
    color: var(--text-primary);
}

.game-layout {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.side-panel {
    display: flex;
    flex-direction: column;
    gap: 15px;
    width: 100px;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 15px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.glass-panel h2 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.main-board-container {
    padding: 10px;
    position: relative;
    border: 1px solid var(--glass-highlight);
    box-shadow: 0 0 20px rgba(188, 19, 254, 0.1);
}

#game-board {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
}

.stat-item {
    text-align: center;
    margin-bottom: 15px;
}

.stat-item:last-child {
    margin-bottom: 0;
}

.label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.value.small {
    font-size: 1rem;
}

/* Overlay */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 18, 0.85);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 16px;
    z-index: 20;
}

.overlay-content {
    text-align: center;
}

.overlay h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--text-primary);
    text-shadow: 0 0 15px var(--neon-blue);
}

.neon-btn {
    background: transparent;
    border: 2px solid var(--neon-blue);
    color: var(--neon-blue);
    padding: 12px 30px;
    font-size: 1.2rem;
    font-family: var(--font-main);
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.2);
    margin-top: 20px;
}

.neon-btn:hover {
    background: var(--neon-blue);
    color: #000;
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.6);
}

/* Mobile Controls */
.mobile-controls {
    display: none;
    /* Hidden by default on desktop */
    margin-top: 20px;
    width: 100%;
    max-width: 400px;
    justify-content: space-between;
    align-items: center;
}

.control-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-size: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    backdrop-filter: blur(5px);
    touch-action: manipulation;
}

.control-btn:active {
    background: var(--glass-highlight);
}

.d-pad {
    display: flex;
    gap: 10px;
}

/* Responsive Mobile Layout */
@media (max-width: 768px) {
    .game-container {
        padding: 5px;
        height: 100vh;
        justify-content: flex-start;
        transform: none;
        /* Reset previous scaling */
        margin-top: 0;
    }

    .game-header {
        margin-bottom: 10px;
    }

    .game-header h1 {
        font-size: 1.2rem;
        position: static;
        transform: none;
    }

    .back-btn {
        font-size: 0.9rem;
    }

    .game-layout {
        display: grid;
        grid-template-columns: auto auto;
        grid-template-rows: auto auto;
        gap: 10px;
        width: 100%;
        justify-content: center;
        align-items: start;
    }

    /* Main Board */
    .main-board-container {
        grid-column: 1 / -1;
        grid-row: 2;
        padding: 5px;
        margin: 0;
        justify-self: center;
    }

    #game-board {
        width: 200px;
        height: 400px;
    }

    /* Stats Row (Top) */
    .side-panel.left {
        grid-column: 1 / -1;
        grid-row: 1;
        flex-direction: row;
        width: 100%;
        justify-content: space-between;
        gap: 5px;
        order: unset;
    }

    .glass-panel.stats {
        flex-direction: row;
        padding: 5px 10px;
        gap: 15px;
        width: auto;
        flex: 1;
        justify-content: space-around;
    }

    .stat-item {
        margin: 0;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .stat-item .label {
        font-size: 0.6rem;
    }

    .stat-item .value {
        font-size: 1rem;
    }

    /* Hold & Next (Floating sides) */
    .hold-piece,
    .next-piece {
        position: absolute;
        top: 100px;
        width: 60px;
        padding: 5px;
        z-index: 5;
        display: flex !important;
        /* Force show */
    }

    .hold-piece {
        left: 5px;
    }

    .next-piece {
        right: 5px;
    }

    .hold-piece canvas,
    .next-piece canvas {
        width: 40px;
        height: auto;
    }

    .side-panel.right {
        display: none;
    }

    .score-panel {
        display: none;
    }

    /* Mobile Controls */
    .mobile-controls {
        display: flex;
        position: fixed;
        bottom: 10px;
        left: 50%;
        transform: translateX(-50%);
        width: 95%;
        max-width: 350px;
        gap: 10px;
        z-index: 100;
        padding: 10px;
        background: rgba(10, 10, 18, 0.9);
        border-radius: 20px;
        border: 1px solid var(--glass-border);
    }

    .control-btn {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
}