/* ==========================================
   Reset & Base Styles
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #ec4899;
    --secondary-dark: #db2777;
    --accent: #8b5cf6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-dark: linear-gradient(135deg, #1e1e2e 0%, #2d2d44 100%);
    
    /* Neutrals */
    --dark: #0f0f23;
    --dark-light: #1a1a2e;
    --gray: #64748b;
    --gray-light: #cbd5e1;
    --white: #ffffff;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-sans: 'Noto Sans KR', sans-serif;
    --font-display: 'Poppins', sans-serif;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    --shadow-neon: 0 0 20px rgba(139, 92, 246, 0.5);
    
    /* Borders */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--dark);
    color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ==========================================
   Navigation
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 35, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform var(--transition-base);
}

.navbar.hidden {
    transform: translateY(-100%);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-display);
}

.logo-icon {
    font-size: 2rem;
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-links a {
    color: var(--gray-light);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

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

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-dark);
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(236, 72, 153, 0.15) 0%, transparent 50%);
    animation: pulse 8s ease-in-out infinite;
}

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

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-2xl) 0;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    font-family: var(--font-display);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.neon-text {
    color: #a78bfa;
    text-shadow: 
        0 0 10px rgba(167, 139, 250, 0.8),
        0 0 20px rgba(167, 139, 250, 0.5),
        0 0 30px rgba(167, 139, 250, 0.3);
    animation: neon-glow 2s ease-in-out infinite alternate;
}

@keyframes neon-glow {
    from {
        text-shadow: 
            0 0 10px rgba(167, 139, 250, 0.8),
            0 0 20px rgba(167, 139, 250, 0.5),
            0 0 30px rgba(167, 139, 250, 0.3);
    }
    to {
        text-shadow: 
            0 0 20px rgba(167, 139, 250, 1),
            0 0 30px rgba(167, 139, 250, 0.8),
            0 0 40px rgba(167, 139, 250, 0.6);
    }
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--gray-light);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-2xl);
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-full);
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    position: relative;
    overflow: hidden;
    font-family: var(--font-sans);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.6);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: var(--font-display);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray);
    margin-top: var(--spacing-xs);
}

/* ==========================================
   Section Headers
   ========================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-display);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-light);
}

/* ==========================================
   Features Section
   ========================================== */
.features {
    padding: var(--spacing-2xl) 0;
    background: var(--dark-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
    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 var(--transition-base);
    z-index: -1;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: rgba(139, 92, 246, 0.5);
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.2);
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    font-size: 2rem;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.feature-desc {
    color: var(--gray-light);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.feature-highlight {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--accent);
    font-weight: 600;
    font-size: 0.875rem;
}

.feature-highlight i {
    color: var(--success);
}

/* ==========================================
   Time Sale Section
   ========================================== */
.timesale {
    padding: var(--spacing-2xl) 0;
    background: var(--dark);
}

.timesale-content {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.timesale-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-secondary);
    opacity: 0.05;
    z-index: -1;
}

.timesale-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    flex-shrink: 0;
    animation: rotate 10s linear infinite;
}

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

.timesale-text {
    flex: 1;
}

.timesale-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.timesale-desc {
    color: var(--gray-light);
    line-height: 1.8;
}

.timesale-badge {
    background: var(--gradient-secondary);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 700;
    white-space: nowrap;
    box-shadow: 0 4px 15px rgba(236, 72, 153, 0.4);
}

/* ==========================================
   How to Use Section
   ========================================== */
.how-to-use {
    padding: var(--spacing-2xl) 0;
    background: var(--dark-light);
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.step-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    position: relative;
    transition: all var(--transition-base);
}

.step-card:hover {
    transform: translateY(-8px);
    border-color: rgba(79, 172, 254, 0.5);
    box-shadow: 0 20px 40px rgba(79, 172, 254, 0.2);
}

.step-number {
    position: absolute;
    top: -20px;
    right: var(--spacing-md);
    width: 50px;
    height: 50px;
    background: var(--gradient-accent);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    font-family: var(--font-display);
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
}

.step-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-accent);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 2.5rem;
}

.step-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.step-desc {
    color: var(--gray-light);
    line-height: 1.8;
}

.simple-message {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.simple-message p {
    font-size: 1.25rem;
    color: var(--gray-light);
}

.simple-message strong {
    color: var(--white);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================
   Grand Opening Section
   ========================================== */
.grand-opening {
    padding: var(--spacing-2xl) 0;
    background: var(--dark);
    position: relative;
    overflow: hidden;
}

.grand-opening::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 30% 50%, rgba(236, 72, 153, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
    z-index: 0;
}

.opening-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.opening-badge {
    display: inline-block;
    background: rgba(139, 92, 246, 0.2);
    border: 1px solid rgba(139, 92, 246, 0.5);
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: #a78bfa;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.opening-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-display);
    color: var(--white);
}

.opening-title .plus {
    color: #ec4899;
    font-size: 0.8em;
    margin: 0 0.2em;
}

.opening-subtitle {
    font-size: 1.5rem;
    color: var(--gray-light);
    margin-bottom: var(--spacing-xl);
}

.opening-date {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(139, 92, 246, 0.3);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.opening-date::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0.1;
    z-index: -1;
}

.date-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--white);
    flex-shrink: 0;
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.4);
    animation: pulse-scale 2s ease-in-out infinite;
}

@keyframes pulse-scale {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.date-info {
    text-align: left;
}

.date-label {
    font-size: 1rem;
    color: var(--gray);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.date-value {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--white);
    font-family: var(--font-display);
    line-height: 1;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background: var(--dark-light);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg) 0;
}

.footer-content {
    text-align: center;
}

.copyright {
    color: var(--gray);
    font-size: 0.875rem;
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .timesale-content {
        flex-direction: column;
        text-align: center;
    }
    
    .timesale-badge {
        width: 100%;
    }
    
    .steps-container {
        grid-template-columns: 1fr;
    }
    
    .opening-date {
        flex-direction: column;
        text-align: center;
    }
    
    .date-info {
        text-align: center;
    }
    
    .date-value {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        gap: var(--spacing-md);
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .date-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }
    
    .date-value {
        font-size: 1.5rem;
    }
    
    .opening-title {
        font-size: 1.75rem;
    }
    
    .opening-subtitle {
        font-size: 1.125rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   Animations
   ========================================== */
[data-aos] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

/* ==========================================
   Utility Classes
   ========================================== */
.text-center {
    text-align: center;
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}