:root {
    --bg-dark: #1a1a2e;
    --bg-darker: #16213e;
    --bg-card: #0f3460;
    --accent-green: #00ff88;
    --accent-red: #ff4757;
    --accent-gold: #ffd700;
    --accent-purple: #9b59b6;
    --text-light: #eaeaea;
    --text-muted: #8b8b8b;
    --card-white: #ffffff;
    --card-red: #e74c3c;
}

body {
    background: var(--bg-dark);
    color: var(--text-light);
    min-height: 100vh;
    overflow-x: auto;
}

.game-top {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
    padding: 0 20px;
}

.stock-waste {
    display: flex;
    gap: 15px;
}

.pile {
    width: 70px;
    height: 100px;
    border: 2px dashed rgba(255,255,255,0.3);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.2);
}

.pile-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.pile.empty {
    background: rgba(0,0,0,0.3);
}

.stock {
    cursor: pointer;
    transition: all 0.2s;
}

.stock:hover {
    border-color: var(--accent-green);
    background: rgba(0,255,136,0.1);
}

.stock.has-cards::after {
    content: "↻";
    font-size: 1.5rem;
    color: var(--accent-green);
}

.waste {
    min-width: 140px;
}

.foundations {
    display: flex;
    gap: 10px;
}

.foundation {
    font-size: 2rem;
    color: var(--text-muted);
    position: relative;
}

.foundation[data-suit="♥"], .foundation[data-suit="♦"] {
    color: var(--card-red);
    opacity: 0.5;
}

.foundation[data-suit="♣"], .foundation[data-suit="♠"] {
    color: #1a1a1a;
    opacity: 0.5;
}

.foundation.complete {
    border-color: var(--accent-green);
    box-shadow: 0 0 20px var(--accent-green);
}

.tableau {
    display: flex;
    justify-content: center;
    gap: 15px;
    padding: 0 20px;
    min-height: 400px;
}

.tableau-column {
    width: 75px;
    min-height: 100px;
    position: relative;
}

.tableau-column .card {
    position: absolute;
    left: 0;
    transition: transform 0.15s ease, box-shadow 0.15s ease, z-index 0s;
}

.tableau-column .card.face-down {
    z-index: 1;
}

.tableau-column .card.face-up {
    z-index: 2;
}

.tableau-column .card.face-up:hover {
    z-index: 100;
}

.card {
    width: 70px;
    height: 100px;
    background: var(--card-white);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    box-shadow: 0 2px 6px rgba(0,0,0,0.4);
    user-select: none;
    font-family: Arial, sans-serif;
}

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

.card.black {
    color: #1a1a1a;
}

.card .rank {
    font-size: 1.2rem;
    font-weight: bold;
    line-height: 1;
}

.card .suit {
    font-size: 1.5rem;
    line-height: 1;
}

.card:hover:not(.face-down) {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,180,216,0.3);
}

.card.selected {
    box-shadow: 0 0 0 3px var(--accent-green), 0 8px 25px rgba(0,255,136,0.4);
    transform: translateY(-5px);
}

.card.face-down {
    background: linear-gradient(135deg, #2c3e50 0%, #1a252f 100%);
    border: 2px solid #3d5a73;
    cursor: default;
}

.card.face-down::after {
    content: "";
    width: 50px;
    height: 70px;
    background: 
        linear-gradient(45deg, transparent 40%, rgba(255,255,255,0.1) 50%, transparent 60%),
        repeating-linear-gradient(0deg, transparent, transparent 8px, rgba(255,255,255,0.05) 8px, rgba(255,255,255,0.05) 9px),
        repeating-linear-gradient(90deg, transparent, transparent 8px, rgba(255,255,255,0.05) 8px, rgba(255,255,255,0.05) 9px);
    border-radius: 4px;
}

.card.dragging {
    opacity: 0.8;
    z-index: 1000;
}

.waste .card {
    position: relative;
}

.waste .card:nth-child(n+2) {
    margin-left: -50px;
}

.waste .card:last-child {
    position: relative;
}

@keyframes dealCard {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
        opacity: 0;
    }
    to {
        transform: translate(0, 0) rotate(0deg);
        opacity: 1;
    }
}

.card.dealing {
    animation: dealCard 0.3s ease-out;
}

.win-modal h2 {
    color: var(--accent-gold);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.stats-display {
    display: flex;
    gap: 20px;
    margin-top: 10px;
}

.stat {
    background: rgba(0,0,0,0.3);
    padding: 5px 12px;
    border-radius: 5px;
    font-size: 0.9rem;
}

.stat span {
    color: var(--accent-green);
    font-weight: bold;
}

.card.hint {
    animation: hint-pulse 0.8s ease-in-out infinite;
    box-shadow: 0 0 20px var(--accent-gold), 0 0 40px var(--accent-gold) !important;
}

@keyframes hint-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.hint-dest {
    border-color: var(--accent-gold) !important;
    box-shadow: 0 0 20px var(--accent-gold);
    animation: hint-pulse-border 0.8s ease-in-out infinite;
}

@keyframes hint-pulse-border {
    0%, 100% { border-color: var(--accent-gold); }
    50% { border-color: var(--accent-green); }
}

.temp-message {
    background: var(--accent-gold);
    color: #1a1a1a;
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: bold;
    margin-bottom: 10px;
    display: inline-block;
    animation: fadeIn 0.3s ease;
}

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

#undo-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}