:root {
    /* Color Palette - Mystical Theme */
    --primary-purple: #8b5cf6;
    --primary-gold: #fbbf24;
    --dark-bg: #0f0a1e;
    --dark-card: #1a1333;
    --dark-card-hover: #251b47;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --accent-cyan: #06b6d4;
    --accent-pink: #ec4899;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-purple) 0%, var(--accent-pink) 100%);
    --gradient-gold: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    --gradient-cosmic: linear-gradient(180deg, #0f0a1e 0%, #1a1333 50%, #251b47 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-glow: 0 0 30px rgba(139, 92, 246, 0.3);
    --shadow-glow-gold: 0 0 40px rgba(251, 191, 36, 0.4);
    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Noto Sans KR', sans-serif;
    background: var(--gradient-cosmic);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Background Effects */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background-image: 
        radial-gradient(2px 2px at 20% 30%, white, transparent),
        radial-gradient(2px 2px at 60% 70%, white, transparent),
        radial-gradient(1px 1px at 50% 50%, white, transparent),
        radial-gradient(1px 1px at 80% 10%, white, transparent),
        radial-gradient(2px 2px at 90% 60%, white, transparent),
        radial-gradient(1px 1px at 33% 80%, white, transparent);
    background-size: 200% 200%;
    animation: twinkle 8s ease-in-out infinite;
    opacity: 0.6;
    z-index: 0;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 0.3; }
}

.cosmic-glow {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    animation: rotate 30s linear infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
    z-index: 1;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-lg) 0;
    position: relative;
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.app-icon-wrapper {
    position: relative;
    display: inline-block;
    margin-bottom: var(--spacing-md);
}

.icon-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    background: var(--gradient-primary);
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.6;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.6; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.8; }
}

.app-icon {
    width: 150px;
    height: 150px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glow);
    position: relative;
    z-index: 2;
    transition: transform 0.3s ease;
}

.app-icon:hover {
    transform: scale(1.05) rotate(5deg);
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.title-main {
    display: block;
    font-size: 4rem;
    font-weight: 900;
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
    font-family: 'Cinzel', serif;
    letter-spacing: 2px;
}

.title-sub {
    display: block;
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--text-secondary);
    letter-spacing: 4px;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

/* Buttons */
.cta-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    border-radius: var(--radius-full);
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 50px rgba(139, 92, 246, 0.5);
}

.btn-icon {
    width: 24px;
    height: 24px;
    position: relative;
    z-index: 1;
}

/* Features Section */
.features {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.section-title {
    text-align: center;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: var(--dark-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(139, 92, 246, 0.2);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-purple);
    box-shadow: var(--shadow-glow);
}

.feature-card:hover::before {
    opacity: 0.1;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    position: relative;
    z-index: 1;
}

.feature-card p {
    color: var(--text-secondary);
    position: relative;
    z-index: 1;
}

/* How It Works Section */
.how-it-works {
    padding: var(--spacing-xl) 0;
    background: rgba(26, 19, 51, 0.5);
}

.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.step {
    flex: 1;
    min-width: 200px;
    max-width: 250px;
    text-align: center;
    padding: var(--spacing-md);
    background: var(--dark-card);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.step:hover {
    border-color: var(--primary-purple);
    transform: scale(1.05);
}

.step-number {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-sm);
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    box-shadow: var(--shadow-glow);
}

.step h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-gold);
}

.step p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.step-arrow {
    font-size: 2rem;
    color: var(--primary-purple);
    font-weight: 700;
}

/* Privacy Section */
.privacy {
    padding: var(--spacing-xl) 0;
}

.privacy-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    background: var(--dark-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.privacy-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.privacy-content strong {
    color: var(--primary-gold);
}

/* Footer */
.footer {
    background: var(--dark-bg);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    border-top: 1px solid rgba(139, 92, 246, 0.2);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-section h3 {
    color: var(--primary-gold);
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
}

.footer-section h4 {
    color: var(--primary-purple);
    margin-bottom: var(--spacing-xs);
}

.footer-section p,
.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(139, 92, 246, 0.1);
    color: var(--text-secondary);
}

.footer-note {
    font-size: 0.9rem;
    margin-top: var(--spacing-xs);
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .title-main {
        font-size: 2.5rem;
    }
    
    .title-sub {
        font-size: 1.1rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .step-arrow {
        display: none;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .step {
        max-width: 100%;
    }
}