: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;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
    min-height: 100vh;
    color: var(--text-light);
}

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--bg-card);
    border-radius: 10px;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

h1 {
    font-size: 1.8rem;
    color: var(--accent-gold);
}

.back-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
}

.back-link:hover {
    color: var(--accent-green);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.header-stats {
    display: flex;
    gap: 2rem;
    font-size: 1.1rem;
}

.header-stats span {
    color: var(--text-muted);
}

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

.mode-select {
    text-align: center;
    padding: 3rem;
    background: var(--bg-card);
    border-radius: 10px;
}

.mode-select h2 {
    margin-bottom: 2rem;
    color: var(--accent-gold);
}

.mode-buttons, .ai-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.ai-select {
    margin-top: 2rem;
}

.ai-select h3 {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: bold;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn:hover:not(:disabled) {
    transform: translateY(-2px);
}

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

.btn-primary {
    background: var(--accent-green);
    color: #1a1a1a;
}

.btn-gold {
    background: var(--accent-gold);
    color: #1a1a1a;
}

.btn-secondary {
    background: var(--text-muted);
    color: #1a1a1a;
}

.btn-purple {
    background: var(--accent-purple);
    color: white;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.2rem;
}

.mt-2 {
    margin-top: 0.5rem;
}

.ai-players {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.ai-player {
    background: var(--bg-card);
    border-radius: 10px;
    padding: 0.75rem;
    min-width: 150px;
    text-align: center;
}

.ai-player h4 {
    font-size: 0.9rem;
    color: var(--accent-gold);
    margin-bottom: 0.5rem;
}

.ai-cards-display {
    display: flex;
    justify-content: center;
    gap: 0.25rem;
    font-size: 0.8rem;
}

.ai-cards-display span {
    background: var(--bg-darker);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.ai-cards-display .total {
    background: var(--accent-red);
    color: white;
    font-weight: bold;
}

.center-area {
    background: var(--bg-darker);
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.pile-display h3 {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.pile-cards {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    min-height: 80px;
    align-items: center;
    flex-wrap: wrap;
}

.pile-cards .card {
    cursor: default;
}

.pile-value {
    margin-top: 1rem;
    font-size: 1.2rem;
    color: var(--accent-gold);
}

.message {
    margin-top: 1rem;
    font-size: 1.2rem;
    font-weight: bold;
    min-height: 2rem;
}

.message.your-turn {
    color: var(--accent-green);
}

.message.ai-turn {
    color: var(--accent-purple);
}

.message.clear {
    color: var(--accent-gold);
    animation: pulse 0.5s ease-in-out infinite alternate;
}

.message.must-take {
    color: var(--accent-red);
}

@keyframes pulse {
    from { transform: scale(1); }
    to { transform: scale(1.05); }
}

.player-area {
    background: var(--bg-card);
    border-radius: 10px;
    padding: 1rem;
}

.player-area h3 {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--accent-gold);
}

.player-cards {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.card-zone {
    text-align: center;
}

.card-zone h4 {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.card-zone h4 span {
    color: var(--accent-green);
}

.card-row {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
    min-height: 60px;
    align-items: center;
}

.hand-row {
    min-width: 300px;
}

.card {
    width: 50px;
    height: 70px;
    background: var(--card-white);
    border-radius: 6px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
    font-weight: bold;
}

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

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

.card .rank {
    font-size: 1.1rem;
}

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

.card:hover:not(.disabled):not(.selected) {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 180, 216, 0.4);
}

.card.selected {
    transform: translateY(-10px);
    box-shadow: 0 0 20px var(--accent-green);
    border: 2px solid var(--accent-green);
}

.card.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.card.face-down::before {
    content: '?';
    font-size: 1.5rem;
    color: var(--text-muted);
}

.card.wild {
    background: linear-gradient(135deg, var(--accent-gold), #ff8c00);
    color: #1a1a1a;
}

.player-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 10px;
    max-width: 500px;
    width: 90%;
    text-align: center;
}

.modal-content h2 {
    color: var(--accent-gold);
    margin-bottom: 1.5rem;
}

.modal-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.score-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    background: var(--bg-darker);
    border-radius: 5px;
    margin-bottom: 0.5rem;
}

.score-row.winner {
    background: var(--accent-green);
    color: #1a1a1a;
}

.score-row .name {
    font-weight: bold;
}

.score-row .points {
    color: var(--accent-red);
}

.score-row.winner .points {
    color: #1a1a1a;
}

.hidden {
    display: none !important;
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 1rem;
    }

    .player-cards {
        gap: 1rem;
    }

    .card-zone {
        width: 100%;
    }

    .card-row {
        min-width: auto;
    }

    .card {
        width: 45px;
        height: 63px;
    }

    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
}

.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: 1000;
    padding: 1rem;
}

.modal-content {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 15px;
    max-width: 650px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-content h2 {
    color: var(--accent-gold);
    margin-bottom: 1.5rem;
    text-align: center;
}

.rules-text {
    text-align: left;
}

.rules-text p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

.rules-text h4 {
    color: var(--accent-gold);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.rules-text ul {
    list-style: none;
    padding-left: 0;
}

.rules-text li {
    padding: 0.4rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-muted);
}

.rules-text li::before {
    content: "•";
    color: var(--accent-green);
    position: absolute;
    left: 0;
}

.rules-text li ul {
    margin-top: 0.5rem;
}

.rules-text li li {
    font-size: 0.9rem;
}