:root {
    --primary: #ffd700;
    --primary-dark: #b8860b;
    --secondary: #1a1a2e;
    --accent: #16213e;
    --bg: #0a0a0f;
    --text: #e8e8e8;
    --text-muted: #a0a0a0;
    --card-bg: rgba(22, 33, 62, 0.8);
    --gold: linear-gradient(135deg, #ffd700, #ffaa00);
}

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

body {
    font-family: 'Georgia', serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
}

.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background: radial-gradient(2px 2px at 20px 30px, #fff, transparent),
                radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.8), transparent),
                radial-gradient(1px 1px at 90px 40px, #fff, transparent),
                radial-gradient(2px 2px at 160px 120px, rgba(255,255,255,0.6), transparent),
                radial-gradient(1px 1px at 230px 80px, #fff, transparent),
                radial-gradient(2px 2px at 300px 200px, rgba(255,215,0,0.5), transparent),
                radial-gradient(1px 1px at 350px 150px, #fff, transparent),
                radial-gradient(2px 2px at 420px 50px, rgba(255,255,255,0.7), transparent);
    background-size: 500px 300px;
    animation: twinkle 8s ease-in-out infinite;
    z-index: 0;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

header {
    padding: 20px 0;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
}

header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.5rem;
    background: var(--gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    margin-left: 30px;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary);
}

.hero {
    padding: 80px 0;
    text-align: center;
    min-height: 70vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 20px;
    background: var(--gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.question-section {
    max-width: 600px;
    margin: 0 auto 40px;
}

.question-section label {
    display: block;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.question-section textarea {
    width: 100%;
    padding: 15px;
    background: var(--card-bg);
    border: 1px solid rgba(255, 215, 0, 0.2);
    border-radius: 12px;
    color: var(--text);
    font-family: inherit;
    font-size: 1rem;
    resize: none;
    transition: border-color 0.3s;
}

.question-section textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.char-count {
    text-align: right;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 5px;
}

.casting-method {
    margin: 40px 0;
}

.casting-method h3 {
    font-size: 1.5rem;
    margin-bottom: 30px;
    color: var(--primary);
}

.coins-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
}

.coin {
    width: 80px;
    height: 80px;
    perspective: 1000px;
    cursor: pointer;
    position: relative;
}

.coin-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.4);
    transition: transform 0.1s;
}

.coin-face.heads {
    background: var(--gold);
}

.coin-face.tails {
    background: linear-gradient(135deg, #c0c0c0, #808080);
    transform: rotateY(180deg);
}

.coin-face svg {
    width: 60px;
    height: 60px;
}

.coin.flipping .coin-face.heads {
    transform: rotateY(360deg);
}

.coin.flipping .coin-face.tails {
    transform: rotateY(180deg);
}

.coin.flipping {
    animation: coinFlip 0.6s ease-in-out;
}

@keyframes coinFlip {
    0% { transform: rotateX(0) rotateY(0); }
    50% { transform: rotateX(90deg) rotateY(180deg); }
    100% { transform: rotateX(0) rotateY(360deg); }
}

.casting-instruction {
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 20px;
}

.casting-progress {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.progress-line {
    width: 30px;
    height: 6px;
    background: rgba(255, 215, 0, 0.2);
    border-radius: 3px;
    transition: background 0.3s;
}

.progress-line.active {
    background: var(--primary);
}

.btn-primary {
    background: var(--gold);
    color: #1a1a2e;
    border: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    font-family: inherit;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 215, 0, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    padding: 15px 40px;
    font-size: 1.1rem;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
    margin-left: 15px;
}

.btn-secondary:hover {
    background: rgba(255, 215, 0, 0.1);
}

.btn-premium {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 18px 50px;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    font-family: inherit;
}

.btn-premium:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

.hexagram-display {
    padding: 60px 0;
}

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 40px;
    color: var(--primary);
}

.hexagram-result {
    max-width: 700px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: 20px;
    padding: 40px;
    border: 1px solid rgba(255, 215, 0, 0.2);
    text-align: center;
}

.hexagram-symbol {
    font-size: 5rem;
    margin-bottom: 20px;
}

.hexagram-chinese {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.hexagram-name {
    font-size: 2rem;
    margin-bottom: 10px;
}

.hexagram-number {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 20px;
}

.hexagram-trigrams {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.hexagram-keywords {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.keyword {
    background: rgba(255, 215, 0, 0.1);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--primary);
}

.reading-section {
    padding: 60px 0;
}

.reading-content {
    max-width: 800px;
    margin: 0 auto;
}

.reading-content h3 {
    font-size: 1.8rem;
    margin-bottom: 30px;
    color: var(--primary);
    text-align: center;
}

.hexagram-meanings {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 30px;
}

.meaning-block {
    margin-bottom: 25px;
}

.meaning-block:last-child {
    margin-bottom: 0;
}

.meaning-block h4 {
    color: var(--primary);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.meaning-block p {
    line-height: 1.8;
    color: var(--text);
}

.premium-upsell {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(118, 75, 162, 0.2));
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    margin-bottom: 30px;
    border: 1px solid rgba(102, 126, 234, 0.3);
}

.premium-upsell h4 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.premium-upsell p {
    color: var(--text-muted);
    margin-bottom: 20px;
}

.premium-features {
    list-style: none;
    margin-bottom: 30px;
}

.premium-features li {
    padding: 8px 0;
    color: var(--text);
}

.btn-share {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: transparent;
    border: 2px solid var(--text-muted);
    color: var(--text);
    padding: 12px 30px;
    border-radius: 30px;
    cursor: pointer;
    margin: 0 auto 20px;
    transition: all 0.3s;
    font-family: inherit;
}

.btn-share:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.section-light {
    padding: 80px 0;
    background: rgba(26, 26, 46, 0.5);
}

.section-light h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
    color: var(--primary);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    text-align: center;
}

.step {
    padding: 30px;
}

.step-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.step h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.step p {
    color: var(--text-muted);
    line-height: 1.6;
}

.hexagrams-info {
    padding: 80px 0;
}

.hexagrams-info h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.hexagrams-intro {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.hexagrams-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 20px;
}

.hexagram-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid transparent;
}

.hexagram-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(255, 215, 0, 0.1);
    border-color: rgba(255, 215, 0, 0.3);
}

.hexagram-card .symbol {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.hexagram-card .name {
    font-size: 1rem;
    margin-bottom: 5px;
}

.hexagram-card .chinese-name {
    font-size: 1.5rem;
    color: var(--primary);
}

.pricing-section {
    padding: 80px 0;
    background: rgba(26, 26, 46, 0.5);
}

.pricing-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
    color: var(--primary);
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    max-width: 700px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    border: 1px solid rgba(255, 215, 0, 0.1);
    position: relative;
}

.pricing-card.featured {
    border-color: var(--primary);
}

.pricing-card .badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gold);
    color: #1a1a2e;
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.pricing-card .price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 30px;
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 30px;
}

.pricing-card li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
}

.pricing-card li:last-child {
    border-bottom: none;
}

footer {
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

footer p {
    color: var(--text-muted);
    margin-bottom: 15px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin: 0 15px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--primary);
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .coins-container {
        gap: 10px;
    }
    
    .coin {
        width: 60px;
        height: 60px;
    }
    
    .coin-face svg {
        width: 45px;
        height: 45px;
    }
    
    .nav-links {
        display: none;
    }
    
    .btn-cast, .btn-reset {
        width: 100%;
    }
}