/* CSS Custom Properties */
:root {
    /* Colors */
    --primary: 220 95% 50%; /* #0D6EFD */
    --primary-dark: 220 95% 35%; /* #0A58CA */
    --primary-light: 220 95% 95%; /* #EBF3FF */
    --secondary: 210 11% 71%; /* #ADB5BD */
    --success: 134 61% 41%; /* #198754 */
    --warning: 45 100% 51%; /* #FFC107 */
    --danger: 354 70% 54%; /* #DC3545 */
    --background: 210 11% 98%; /* #F5F7FA */
    --surface: 0 0% 100%; /* #FFFFFF */
    --text-primary: 210 11% 15%; /* #212529 */
    --text-secondary: 210 7% 56%; /* #6C757D */
    --text-muted: 210 7% 71%; /* #ADB5BD */
    --border: 210 14% 89%; /* #DEE2E6 */
    --border-light: 210 14% 93%; /* #E9ECEF */
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans KR', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Layout */
    --container-max-width: 1200px;
    --border-radius: 0.375rem;
    --border-radius-lg: 0.5rem;
    --box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --box-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: hsl(var(--text-primary));
    background-color: hsl(var(--background));
}

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

a {
    color: hsl(var(--primary));
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: hsl(var(--primary-dark));
}

/* Utility Classes */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    background: none;
    line-height: 1.5;
}

.btn-primary {
    background-color: hsl(var(--primary));
    color: white;
}

.btn-primary:hover {
    background-color: hsl(var(--primary-dark));
    color: white;
}

.btn-secondary {
    background-color: hsl(var(--secondary));
    color: white;
}

.btn-secondary:hover {
    background-color: hsl(var(--secondary) / 0.8);
    color: white;
}

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

.btn-outline:hover {
    background-color: hsl(var(--primary));
    color: white;
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

/* Header */
.header {
    background-color: hsl(var(--surface));
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    padding: var(--spacing-md) 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.logo-text {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: hsl(var(--text-primary));
}

.logo-tagline {
    font-size: var(--font-size-xs);
    color: hsl(var(--text-secondary));
    letter-spacing: 0.1em;
    margin-top: -0.25rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
    margin: 0;
}

.nav-link {
    color: hsl(var(--text-primary));
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: hsl(var(--primary));
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: hsl(var(--primary));
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: hsl(var(--text-primary));
    margin: 2px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, hsl(var(--primary-light)), hsl(var(--surface)));
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    color: hsl(var(--text-primary));
}

.highlight {
    color: hsl(var(--primary));
}

.hero-description {
    font-size: var(--font-size-lg);
    color: hsl(var(--text-secondary));
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
}

.hero-image svg {
    width: 100%;
    height: auto;
}

/* Sections */
.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: hsl(var(--text-primary));
}

.section-description {
    font-size: var(--font-size-lg);
    text-align: center;
    color: hsl(var(--text-secondary));
    margin-bottom: var(--spacing-3xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Services Section */
.services {
    padding: var(--spacing-3xl) 0;
    background-color: hsl(var(--surface));
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    text-align: center;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    background-color: hsl(var(--surface));
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-lg);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: hsl(var(--primary-light));
    border-radius: 50%;
    color: hsl(var(--primary));
}

.service-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: hsl(var(--text-primary));
}

.service-card p {
    color: hsl(var(--text-secondary));
    line-height: 1.6;
}

/* About Preview Section */
.about-preview {
    padding: var(--spacing-3xl) 0;
    background-color: hsl(var(--background));
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-text h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: hsl(var(--text-primary));
}

.about-text p {
    font-size: var(--font-size-lg);
    color: hsl(var(--text-secondary));
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.stats {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

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

.stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: hsl(var(--primary));
}

.stat-label {
    font-size: var(--font-size-sm);
    color: hsl(var(--text-secondary));
}

.about-image svg {
    width: 100%;
    height: auto;
}

/* Reviews Section */
.reviews {
    padding: var(--spacing-3xl) 0;
    background-color: hsl(var(--surface));
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.review-card {
    padding: var(--spacing-xl);
    background-color: hsl(var(--surface));
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow);
    border-left: 4px solid hsl(var(--primary));
}

.review-rating {
    margin-bottom: var(--spacing-md);
}

.stars {
    color: hsl(var(--warning));
    font-size: var(--font-size-lg);
}

.review-text {
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: hsl(var(--text-primary));
    margin-bottom: var(--spacing-lg);
    font-style: italic;
}

.review-author {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.author-name {
    font-weight: 600;
    color: hsl(var(--text-primary));
}

.author-location {
    font-size: var(--font-size-sm);
    color: hsl(var(--text-secondary));
}

/* Newsletter Section */
.newsletter {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, hsl(var(--primary)), hsl(var(--primary-dark)));
    color: white;
}

.newsletter-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.newsletter h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.newsletter p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.newsletter-form {
    margin-bottom: var(--spacing-lg);
}

.form-group {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.newsletter-form input {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
}

.newsletter-form input:focus {
    outline: none;
    box-shadow: 0 0 0 3px hsl(var(--primary) / 0.3);
}

.form-note {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.form-note a {
    color: white;
    text-decoration: underline;
}

/* Footer */
.footer {
    background-color: hsl(var(--text-primary));
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

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

.footer-section h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

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

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

.footer-section a {
    color: hsl(var(--text-muted));
    transition: var(--transition);
}

.footer-section a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: hsl(var(--text-secondary));
    border-radius: 50%;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: hsl(var(--primary));
}

.contact-info p {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    color: hsl(var(--text-muted));
}

.contact-info svg {
    margin-top: 2px;
    flex-shrink: 0;
}

.footer-bottom {
    border-top: 1px solid hsl(var(--text-secondary));
    padding-top: var(--spacing-lg);
}

.footer-legal {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: hsl(var(--text-muted));
    font-size: var(--font-size-sm);
}

.legal-links {
    display: flex;
    gap: var(--spacing-lg);
}

.legal-links a {
    color: hsl(var(--text-muted));
}

.legal-links a:hover {
    color: white;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: hsl(var(--text-primary));
    color: white;
    padding: var(--spacing-lg);
    z-index: 9999;
    box-shadow: var(--box-shadow-lg);
}

.cookie-content {
    max-width: var(--container-max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.cookie-content h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.cookie-content p {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.cookie-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-shrink: 0;
}

.cookie-buttons .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.modal-content {
    background-color: white;
    border-radius: var(--border-radius-lg);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid hsl(var(--border));
}

.modal-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: hsl(var(--text-secondary));
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-body {
    padding: var(--spacing-lg);
}

.cookie-category {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
    gap: var(--spacing-lg);
}

.cookie-category h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.cookie-category p {
    font-size: var(--font-size-sm);
    color: hsl(var(--text-secondary));
    line-height: 1.5;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: hsl(var(--border));
    transition: var(--transition);
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition);
    border-radius: 50%;
}

input:checked + .slider {
    background-color: hsl(var(--primary));
}

input:checked + .slider:before {
    transform: translateX(26px);
}

input:disabled + .slider {
    opacity: 0.5;
    cursor: not-allowed;
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid hsl(var(--border));
    display: flex;
    justify-content: flex-end;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .stats {
        justify-content: center;
    }
    
    .form-group {
        flex-direction: column;
    }
    
    .cookie-content {
        flex-direction: column;
        text-align: center;
    }
    
    .cookie-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .footer-legal {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .legal-links {
        justify-content: center;
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .services {
        padding: var(--spacing-xl) 0;
    }
    
    .about-preview {
        padding: var(--spacing-xl) 0;
    }
    
    .reviews {
        padding: var(--spacing-xl) 0;
    }
    
    .newsletter {
        padding: var(--spacing-xl) 0;
    }
    
    .footer {
        padding: var(--spacing-xl) 0 var(--spacing-lg);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .reviews-grid {
        grid-template-columns: 1fr;
    }
    
    .stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
}