:root {
    --card-w: 70px;
    --card-h: 100px;
    --card-radius: 6px;
    --card-gap: 8px;
    --card-overlap: 25px;
    --bg-dark: #1a1a2e;
    --bg-darker: #16162a;
    --bg-card: #252550;
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --accent-color: #e94560;
    --accent-hover: #ff6b6b;
    --accent-green: #00ff88;
    --accent-cyan: #00d4ff;
    --accent-yellow: #ffd700;
    --card-red: #e74c3c;
    --card-black: #2c3e50;
    --border-color: #2a2a4a;
    --gradient-title: linear-gradient(135deg, #00ff88 0%, #00d4ff 25%, #ffd700 50%, #ff6b6b 75%, #e94560 100%);
}

* {
    box-sizing: border-box;
}

body {
    background: var(--bg-dark);
    min-height: 100vh;
    user-select: none;
    touch-action: none;
}

.game-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.game-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: var(--bg-darker);
    border-radius: 12px;
    margin-bottom: 1rem;
    border: 1px solid rgba(0, 212, 255, 0.2);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.game-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-title);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 1rem;
    text-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
    animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        text-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
    }
    to {
        text-shadow: 0 0 40px rgba(0, 255, 136, 0.5), 0 0 60px rgba(0, 212, 255, 0.3);
    }
}

.stats-bar {
    display: flex;
    gap: 2rem;
    padding: 0.75rem 1.5rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    border: 1px solid rgba(255, 215, 0, 0.2);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 80px;
}

.stat-label {
    font-size: 0.7rem;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 600;
}

.stat-value {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

.stat-value.gold {
    color: var(--accent-yellow);
}

.stat-value.green {
    color: var(--accent-green);
}

.game-board {
    background: var(--bg-darker);
    border-radius: 12px;
    padding: 1.5rem;
    overflow-x: auto;
    border: 1px solid rgba(0, 212, 255, 0.1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.top-row {
    display: grid;
    grid-template-columns: var(--card-w) var(--card-w) repeat(4, var(--card-w));
    gap: var(--card-gap);
    margin-bottom: 1.5rem;
    justify-content: center;
    min-width: max-content;
}

.stock {
    position: relative;
    cursor: pointer;
}

.waste {
    position: relative;
}

.foundations {
    display: grid;
    grid-template-columns: repeat(4, var(--card-w));
    gap: var(--card-gap);
}

.pile {
    width: var(--card-w);
    height: var(--card-h);
    border-radius: var(--card-radius);
    border: 2px dashed var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: rgba(255, 255, 255, 0.02);
}

.pile.empty {
    background: rgba(0, 212, 255, 0.05);
    border-color: rgba(0, 212, 255, 0.2);
}

.pile-icon {
    font-size: 1.5rem;
    color: var(--accent-cyan);
    opacity: 0.7;
}

.suit-icon {
    font-size: 1.5rem;
    color: var(--accent-yellow);
    opacity: 0.6;
}

.tableau {
    display: grid;
    grid-template-columns: repeat(7, var(--card-w));
    gap: var(--card-gap);
    justify-content: center;
    min-width: max-content;
    position: relative;
}

.column {
    position: relative;
    min-height: var(--card-h);
    min-width: var(--card-w);
    cursor: pointer;
}

.card {
    width: var(--card-w);
    height: var(--card-h);
    border-radius: var(--card-radius);
    background: #fff;
    position: absolute;
    cursor: grab;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3), 0 0 1px rgba(0, 0, 0, 0.2);
    transition: box-shadow 0.1s ease, transform 0.1s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 4px;
    user-select: none;
    touch-action: none;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0, 212, 255, 0.4);
    transform: translateY(-2px);
}

.card.face-down {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #1e3c72 100%);
    background-size: 200% 200%;
    animation: cardShine 3s ease infinite;
    cursor: default;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

@keyframes cardShine {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.card.face-down:hover {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    transform: none;
}

.card--red {
    color: var(--card-red);
}

.card--black {
    color: var(--card-black);
}

.card.dragging {
    position: fixed;
    z-index: 1000;
    cursor: grabbing;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 212, 255, 0.3);
    pointer-events: none;
}

.card-corner {
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1;
}

.card-corner.bottom {
    align-self: flex-end;
    transform: rotate(180deg);
}

.card-rank {
    font-size: 0.9rem;
    font-weight: 700;
}

.card-suit {
    font-size: 0.8rem;
}

.card-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
}

.game-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary {
    background: var(--accent-color);
    color: #fff;
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.4);
}

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 6px 20px rgba(233, 69, 96, 0.6);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-body {
    background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-card) 100%);
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
    max-width: 450px;
    width: 90%;
    border: 1px solid rgba(0, 212, 255, 0.2);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 255, 136, 0.1);
}

.modal-body h3 {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-title);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.modal-body p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.win-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
}

@media (max-width: 768px) {
    :root {
        --card-w: 50px;
        --card-h: 72px;
        --card-gap: 6px;
        --card-overlap: 20px;
    }

    .game-header {
        padding: 1rem;
    }

    .game-header h1 {
        font-size: 1.8rem;
        letter-spacing: 2px;
    }

    .stats-bar {
        gap: 1rem;
        padding: 0.5rem 1rem;
    }

    .stat {
        min-width: 60px;
    }

    .stat-value {
        font-size: 1.1rem;
    }

    .top-row {
        grid-template-columns: var(--card-w) var(--card-w) repeat(4, var(--card-w));
    }

    .tableau {
        grid-template-columns: repeat(7, var(--card-w));
    }

    .card-rank {
        font-size: 0.7rem;
    }

    .card-suit {
        font-size: 0.6rem;
    }

    .card-center {
        font-size: 1.5rem;
    }
}

@media (min-width: 601px) and (max-width: 1024px) {
    :root {
        --card-w: 60px;
        --card-h: 86px;
        --card-gap: 7px;
        --card-overlap: 22px;
    }

    .game-header {
        padding: 1.25rem;
    }

    .game-header h1 {
        font-size: 2rem;
    }

    .stats-bar {
        gap: 1.5rem;
        padding: 0.6rem 1.25rem;
    }

    .stat {
        min-width: 70px;
    }

    .stat-value {
        font-size: 1.25rem;
    }

    .card-rank {
        font-size: 0.8rem;
    }

    .card-suit {
        font-size: 0.7rem;
    }

    .card-center {
        font-size: 1.75rem;
    }

    .game-controls {
        gap: 0.75rem;
    }

    .btn {
        padding: 0.6rem 1.25rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    :root {
        --card-w: 40px;
        --card-h: 58px;
        --card-gap: 4px;
    }

    .game-container {
        padding: 0.5rem;
    }

    .game-board {
        padding: 0.75rem;
    }

    .game-header h1 {
        font-size: 1.4rem;
    }

    .stats-bar {
        gap: 0.75rem;
    }

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

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