/* Mahjong Solitaire - Premium Green Theme */
:root {
    --mahjong-accent: #059669;
    --mahjong-glow: rgba(5, 150, 105, 0.4);
}

body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background:
        radial-gradient(circle at 20% 20%, rgba(5, 150, 105, 0.15), transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.1), transparent 50%),
        var(--bg-main);
    font-family: var(--font-main);
    color: var(--text-1);
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-x: hidden;
}

.header {
    width: 100%;
    max-width: 1200px;
    margin: 20px auto;
    padding: 24px 32px;
    background: var(--surface-1);
    backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-1);
    border-radius: var(--radius-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-md);
    box-sizing: border-box;
}

.header h1 {
    margin: 0;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.home-btn {
    background: var(--surface-2);
    color: var(--text-0);
    border: 1px solid var(--border-1);
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

.home-btn:hover {
    background: var(--surface-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-sm);
}

.game-container {
    display: flex;
    gap: 32px;
    max-width: 1400px;
    width: 95%;
    margin: 20px auto;
    align-items: flex-start;
}

.stats-panel {
    background: var(--surface-1);
    backdrop-filter: blur(var(--glass-blur));
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-1);
    width: 280px;
    flex-shrink: 0;
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-2);
    font-weight: 600;
}

.stat-value {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-0);
}

.controls {
    display: grid;
    gap: 12px;
}

.action-btn {
    padding: 14px;
    border-radius: var(--radius-md);
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-base);
    border: 1px solid var(--border-1);
}

.action-btn.primary {
    background: var(--accent-gradient);
    color: white;
    border: none;
}

.action-btn.secondary {
    background: var(--surface-3);
    color: var(--text-1);
}

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

.game-board {
    flex-grow: 1;
    background: var(--surface-1);
    backdrop-filter: blur(var(--glass-blur));
    padding: 40px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-1);
    box-shadow: var(--shadow-xl);
    min-height: 600px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.mahjong-grid {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 500px;
    transform-style: preserve-3d;
    perspective: 1000px;
}

.status-message {
    font-size: 0.9rem;
    color: var(--text-2);
    font-style: italic;
}

/* Modals */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(5, 8, 20, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: opacity 0.3s ease;
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
    display: none;
}

.modal-content {
    background: var(--surface-1);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-1);
    max-width: 500px;
    width: 90%;
    box-shadow: var(--shadow-2xl);
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.modal.hidden .modal-content {
    transform: translateY(20px);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.modal-header h3 {
    margin: 0;
    font-family: var(--font-display);
    font-size: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-2);
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-body {
    color: var(--text-1);
    font-size: 1rem;
    line-height: 1.6;
}

.modal-footer {
    display: flex;
    gap: 12px;
    margin-top: 32px;
}

.modal-btn {
    flex: 1;
    padding: 14px;
    border-radius: var(--radius-md);
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-base);
}

.modal-btn.primary {
    background: var(--accent-gradient);
    color: white;
    border: none;
}

.modal-btn.secondary {
    background: var(--surface-2);
    color: var(--text-1);
    border: 1px solid var(--border-1);
}

/* SEO Section */
.seo-content-section {
    width: 100%;
    margin-top: 80px;
    padding: 80px 0;
    background: var(--surface-0);
    border-top: 1px solid var(--border-1);
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 40px;
}

.game-description h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    margin-bottom: 24px;
    color: var(--text-0);
}

.game-description p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-2);
    margin-bottom: 24px;
}

.game-description h3 {
    font-size: 1.5rem;
    margin: 40px 0 20px;
    color: var(--text-0);
}

.game-description ul {
    list-style: none;
    padding: 0;
}

.game-description li {
    padding-left: 24px;
    position: relative;
    margin-bottom: 12px;
    color: var(--text-2);
}

.game-description li::before {
    content: "🀄";
    position: absolute;
    left: 0;
    top: 2px;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .game-container {
        flex-direction: column;
    }

    .stats-panel {
        width: 100%;
        box-sizing: border-box;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
    }

    .controls {
        grid-column: span 3;
    }
}

/* Landscape Prompt */
.landscape-prompt {
    position: fixed;
    inset: 0;
    background: var(--bg-main);
    z-index: 9999;
    display: none;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 40px;
}

.landscape-content {
    background: var(--surface-1);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-1);
    box-shadow: var(--shadow-xl);
}

.rotate-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    animation: rotate 2s ease-in-out infinite;
}

@keyframes rotate {

    0%,
    100% {
        transform: rotate(0deg);
    }

    50% {
        transform: rotate(90deg);
    }
}

@media (max-width: 1024px) and (orientation: portrait) {
    .landscape-prompt {
        display: flex;
    }
}