/* ===== DESIGN SYSTEM ===== */
:root {
    /* Colors - Mystical Purple to Blue Gradient */
    --primary-purple: #6B46C1;
    --primary-blue: #3B82F6;
    --deep-purple: #4C1D95;
    --mystic-blue: #1E40AF;
    --accent-gold: #F59E0B;
    --accent-pink: #EC4899;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6B46C1 0%, #3B82F6 100%);
    --gradient-hero: linear-gradient(135deg, #1E1B4B 0%, #312E81 50%, #1E3A8A 100%);
    --gradient-card: linear-gradient(135deg, rgba(107, 70, 193, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    --gradient-text: linear-gradient(135deg, #A78BFA 0%, #60A5FA 100%);
    --gradient-button: linear-gradient(135deg, #7C3AED 0%, #2563EB 100%);
    --gradient-button-hover: linear-gradient(135deg, #8B5CF6 0%, #3B82F6 100%);
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --black: #000000;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-sans: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Nanum Myeongjo', serif;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-base);
}

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

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

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: #F2EDE4;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
    z-index: 1000;
    transition: all var(--transition-base);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-purple);
}

.logo-icon {
    font-size: 1.75rem;
    border-radius: 8px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-links a {
    font-weight: 500;
    color: var(--gray-700);
    transition: color var(--transition-base);
}

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

/* ===== BUTTONS ===== */
.btn-primary,
.btn-secondary,
.btn-hero-primary,
.btn-hero-secondary {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    font-size: 1rem;
}

.btn-primary,
.btn-hero-primary {
    background: var(--gradient-button);
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover,
.btn-hero-primary:hover {
    background: var(--gradient-button-hover);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    transform: translateY(-2px);
}

.btn-secondary,
.btn-hero-secondary {
    background: var(--white);
    color: var(--primary-purple);
    border: 2px solid var(--primary-purple);
}

.btn-logout {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--gray-600);
    border: 1px solid var(--gray-300);
    background: transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn-logout:hover {
    color: #DC2626;
    border-color: #DC2626;
    background: rgba(220, 38, 38, 0.05);
}

.btn-secondary:hover,
.btn-hero-secondary:hover {
    background: var(--primary-purple);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-hero-primary {
    padding: 1.25rem 3rem;
    font-size: 1.125rem;
}

.btn-hero-secondary {
    padding: 1.25rem 3rem;
    font-size: 1.125rem;
}

/* ===== HERO SECTION ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.floating-element {
    position: absolute;
    animation: float 6s ease-in-out infinite;
}

.star {
    color: rgba(255, 255, 255, 0.8);
    font-size: 2rem;
}

.star-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.star-2 {
    top: 60%;
    right: 15%;
    animation-delay: 2s;
}

.star-3 {
    bottom: 30%;
    left: 20%;
    animation-delay: 4s;
}

.korean-pattern {
    width: 150px;
    height: 150px;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="2"/><path d="M50 10 L50 90 M10 50 L90 50" stroke="rgba(255,255,255,0.1)" stroke-width="2"/></svg>');
    opacity: 0.3;
}

.pattern-1 {
    top: 15%;
    right: 10%;
    animation-delay: 1s;
}

.pattern-2 {
    bottom: 20%;
    right: 25%;
    animation-delay: 3s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(10deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--white);
    max-width: 900px;
    padding: var(--spacing-2xl) var(--spacing-md);
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.75rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    opacity: 0.95;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-tagline {
    font-size: 1.25rem;
    font-weight: 300;
    margin-bottom: var(--spacing-xl);
    opacity: 0.85;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 1s ease-out 0.6s both;
    flex-wrap: wrap;
}

.trust-badges {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    animation: fadeInUp 1s ease-out 0.8s both;
    flex-wrap: wrap;
}

.badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-weight: 500;
}

.badge-icon {
    font-size: 1.25rem;
}

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

/* ===== SECTIONS ===== */
section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--gray-900);
}

.section-subtitle {
    font-size: 1.25rem;
    text-align: center;
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
}

/* ===== PROBLEM-SOLUTION SECTION ===== */
.problem-solution {
    background: var(--gray-50);
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.comparison-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-base);
}

.comparison-card:hover {
    transform: translateY(-5px);
}

.comparison-card.problem {
    border: 2px solid var(--gray-200);
}

.comparison-card.solution {
    border: 2px solid var(--primary-purple);
    background: var(--gradient-card);
}

.comparison-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.comparison-list {
    list-style: none;
}

.comparison-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    font-size: 1.125rem;
}

.comparison-list .icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

/* ===== FEATURES SECTION ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-900);
}

.feature-card p {
    color: var(--gray-600);
    line-height: 1.7;
}

/* ===== COMPARISON TABLE ===== */
.comparison-table-section {
    background: var(--gray-50);
}

.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.comparison-table {
    width: 100%;
    background: var(--white);
    border-collapse: collapse;
    min-width: 600px;
}

.comparison-table thead {
    background: var(--gradient-primary);
    color: var(--white);
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-md);
    text-align: center;
    border-bottom: 1px solid var(--gray-200);
}

.comparison-table th {
    font-weight: 700;
    font-size: 1.125rem;
}

.comparison-table td {
    font-size: 1rem;
}

.comparison-table .feature-name {
    font-weight: 600;
    text-align: left;
    color: var(--gray-700);
}

.comparison-table .highlight {
    background: var(--gradient-card);
    font-weight: 700;
    color: var(--primary-purple);
}

.comparison-table tbody tr:hover {
    background: var(--gray-50);
}

/* ===== SAMPLE REPORT SECTION ===== */
.report-preview-carousel {
    position: relative;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.carousel-container {
    position: relative;
    width: 100%;
    aspect-ratio: 3/4;
    background: var(--gray-100);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity var(--transition-slow);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.carousel-slide.active {
    opacity: 1;
}

.report-preview-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-md);
}

.slide-caption {
    margin-top: var(--spacing-md);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-700);
    text-align: center;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.9);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 2rem;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-purple);
}

.carousel-btn:hover {
    background: var(--white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-50%) scale(1.1);
}

.carousel-btn.prev {
    left: var(--spacing-md);
}

.carousel-btn.next {
    right: var(--spacing-md);
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray-300);
    cursor: pointer;
    transition: all var(--transition-base);
}

.dot.active {
    background: var(--primary-purple);
    transform: scale(1.3);
}

.sample-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--gray-700);
    color: var(--gray-400);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-tagline {
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn-hero-primary,
    .btn-hero-secondary {
        padding: 1rem 2rem;
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .nav-links {
        gap: var(--spacing-sm);
        font-size: 0.875rem;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .trust-badges {
        flex-direction: column;
        align-items: stretch;
    }
    
    .badge {
        justify-content: center;
    }
}