/* ===== Zen Solitaire Premium Styles ===== */

:root {
    /* Zen Color Palette */
    --bg-dark: #0f0f0f;
    --bg-wood: #1a120b;
    --accent-gold: #d4af37;
    --accent-red: #8b0000;
    --text-light: #f5f5f5;
    --text-muted: #a0a0a0;
    
    /* Card Styles */
    --card-bg: #ffffff;
    --card-red: #c41e3a;
    --card-black: #1a1a1a;
    --card-width: 90px;
    --card-height: 126px;
    --card-radius: 6px;
    --pile-gap: 16px;
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-blur: blur(12px);
    
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    background-image: 
        linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)),
        url('../bg/wood_texture.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--text-light);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

h1, h2, h3 {
    font-family: 'Noto Serif SC', serif;
    letter-spacing: 0.05em;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* ===== Header & Controls ===== */

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 32px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    margin-bottom: 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.site-title-wrap {
    display: flex;
    flex-direction: column;
}

.site-title {
    font-size: 28px;
    color: var(--accent-gold);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.site-tagline {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: 4px;
}

.controls {
    display: flex;
    gap: 12px;
    align-items: center;
}

.btn {
    padding: 10px 20px;
    background: var(--accent-red);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all var(--transition-speed);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn:hover {
    background: #a50000;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 0, 0, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

#seed-input {
    width: 100px;
    padding: 10px;
    background: rgba(0, 0, 0, 0.3);
    color: var(--text-light);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    font-size: 13px;
    text-align: center;
}

#seed-input:focus {
    outline: none;
    border-color: var(--accent-gold);
}

.stats {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-gold);
    letter-spacing: 1px;
}

/* ===== Game Board ===== */

.game-board {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.top-row {
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
}

.stock-waste, .foundations {
    display: flex;
    gap: var(--pile-gap);
}

.tableau {
    display: flex;
    gap: var(--pile-gap);
    justify-content: center;
    padding-top: 20px;
}

/* ===== Pile Styles ===== */

.pile {
    position: relative;
    width: var(--card-width);
    height: var(--card-height);
    border-radius: var(--card-radius);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-speed);
}

.tableau-pile {
    min-height: 450px;
    background: transparent;
    border: none;
}

.empty-pile, .empty-foundation, .empty-tableau {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: rgba(255, 255, 255, 0.1);
    pointer-events: none;
}

/* ===== Card Styles ===== */

.card {
    position: absolute;
    width: var(--card-width);
    height: var(--card-height);
    border-radius: var(--card-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    cursor: grab;
    transition: transform 0.2s cubic-bezier(0.2, 0, 0.2, 1), box-shadow 0.2s;
    user-select: none;
}

.card:active {
    cursor: grabbing;
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.6);
    z-index: 100 !important;
}

.card.dragging {
    opacity: 0.8;
    transform: scale(1.05);
    z-index: 1000 !important;
}

/* Card Front */
.card-front {
    background: var(--card-bg);
    border: 1px solid #e0e0e0;
    padding: 10px;
    display: flex;
    flex-direction: column;
    color: var(--card-black);
}

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

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

.card-corner.top-left {
    position: absolute;
    top: 8px;
    left: 8px;
}

.card-corner.bottom-right {
    position: absolute;
    bottom: 8px;
    right: 8px;
    transform: rotate(180deg);
}

.card-corner .rank {
    font-family: 'Noto Serif SC', serif;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 2px;
}

.card-corner .suit {
    font-size: 16px;
}

.card-center {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.suit-large {
    font-size: 48px;
    opacity: 0.15;
}

/* Card Back */
.card-back {
    background-image: url('../cards/card_back.png');
    background-size: cover;
    background-position: center;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

/* ===== Content Sections ===== */

.home-content {
    margin-top: 60px;
    display: grid;
    gap: 40px;
}

.home-section {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 32px;
}

.home-section h2 {
    color: var(--accent-gold);
    margin-bottom: 20px;
    font-size: 24px;
}

.home-section p {
    line-height: 1.8;
    color: var(--text-light);
    opacity: 0.8;
    margin-bottom: 16px;
}

.benefit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.benefit-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 24px;
}

.benefit-title {
    color: var(--accent-gold);
    font-weight: 700;
    margin-bottom: 8px;
}

.benefit-desc {
    font-size: 14px;
    color: var(--text-muted);
}

/* ===== Footer ===== */

.game-footer {
    margin-top: 60px;
    padding: 40px;
    text-align: center;
    border-top: 1px solid var(--glass-border);
}

.game-footer p {
    color: var(--text-muted);
    font-size: 14px;
}

.game-footer a {
    color: var(--text-light);
    text-decoration: none;
    margin: 0 10px;
    transition: color 0.2s;
}

.game-footer a:hover {
    color: var(--accent-gold);
}

/* ===== Animations ===== */

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-4px); }
    40% { transform: translateX(4px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

.invalid-move {
    animation: shake 0.4s ease-in-out;
}

.victory-message {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(135deg, var(--accent-red), #500);
    color: white;
    padding: 60px 80px;
    border-radius: 24px;
    box-shadow: 0 32px 64px rgba(0, 0, 0, 0.8);
    text-align: center;
    z-index: 2000;
    border: 2px solid var(--accent-gold);
}

.victory-message h2 {
    font-size: 56px;
    color: var(--accent-gold);
    margin-bottom: 16px;
}

/* ===== Responsive ===== */

@media (max-width: 1024px) {
    :root {
        --card-width: 70px;
        --card-height: 98px;
    }
}

@media (max-width: 768px) {
    .game-header {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .controls {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .tableau {
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 20px;
    }
}