/* ===================================
   Root Variables & Reset
   =================================== */
:root {
    /* Primary Colors */
    --primary-color: #C9A961;
    --primary-dark: #B08D4B;
    --primary-light: #E6D5A8;

    /* Secondary Colors */
    --secondary-color: #1A1A2E;
    --secondary-light: #2E2E48;

    /* Accent Colors */
    --accent-gold: #FFD700;
    --accent-rose: #D4AF37;

    /* Neutral Colors */
    --white: #FFFFFF;
    --black: #000000;
    --gray-100: #F8F9FA;
    --gray-200: #E9ECEF;
    --gray-300: #DEE2E6;
    --gray-400: #CED4DA;
    --gray-500: #ADB5BD;
    --gray-600: #6C757D;
    --gray-700: #495057;
    --gray-800: #343A40;
    --gray-900: #212529;

    /* Gradient */
    --gradient-primary: linear-gradient(135deg, #C9A961 0%, #D4AF37 100%);
    --gradient-dark: linear-gradient(135deg, #1A1A2E 0%, #2E2E48 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(201, 169, 97, 0.9) 0%, rgba(212, 175, 55, 0.9) 100%);

    /* Typography */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing */
    --section-padding: 120px;
    --container-padding: 80px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.25);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --white: #1A1A2E;
    --black: #FFFFFF;
    --gray-100: #212529;
    --gray-200: #343A40;
    --gray-300: #495057;
    --gray-800: #E9ECEF;
    --gray-900: #F8F9FA;
    --secondary-color: #F8F9FA;
    --secondary-light: #E9ECEF;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--gray-800);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal);
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--secondary-color);
}

h1 { font-size: 4rem; }
h2 { font-size: 3rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--gray-700);
}

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

/* ===================================
   Utility Classes
   =================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

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

.accent {
    color: var(--primary-color);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 40px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transition: left var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--secondary-color);
    border-color: var(--primary-color);
}

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

/* Section Styling */
.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-label {
    display: inline-block;
    padding: 8px 24px;
    background: var(--gradient-primary);
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-radius: 50px;
    margin-bottom: 20px;
}

.section-title {
    font-size: 3.5rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.section-description {
    font-size: 1.25rem;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
}

/* ===================================
   Loading Screen
   =================================== */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--secondary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

#loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    text-align: center;
}

.luxury-spinner {
    width: 80px;
    height: 80px;
    margin: 0 auto 30px;
    border: 3px solid rgba(201, 169, 97, 0.3);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    color: var(--primary-color);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 0;
    background: transparent;
    transition: all var(--transition-normal);
    z-index: 1000;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    padding: 15px 0;
}

[data-theme="dark"] .navbar.scrolled {
    background: rgba(26, 26, 46, 0.95);
}

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

.logo h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--secondary-color);
    cursor: pointer;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--secondary-color);
    position: relative;
    padding: 8px 0;
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.theme-toggle {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.theme-toggle:hover {
    background: var(--gradient-primary);
    color: var(--white);
    transform: rotate(180deg);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger span {
    display: block;
    width: 28px;
    height: 3px;
    background: var(--secondary-color);
    transition: all var(--transition-normal);
    border-radius: 2px;
}

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

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.animated-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg,
        rgba(201, 169, 97, 0.05) 0%,
        rgba(212, 175, 55, 0.05) 50%,
        rgba(201, 169, 97, 0.05) 100%);
    animation: gradientAnimation 15s ease infinite;
    background-size: 200% 200%;
}

@keyframes gradientAnimation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero-content {
    text-align: center;
    max-width: 1000px;
    margin: 0 auto;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 4px;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 30px;
    color: var(--secondary-color);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 50px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 80px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 60px;
    max-width: 900px;
    margin: 0 auto;
}

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

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--primary-color);
    border-radius: 20px;
    margin: 0 auto 10px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 1; top: 8px; }
    100% { opacity: 0; top: 24px; }
}

.scroll-indicator p {
    font-size: 0.75rem;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ===================================
   About Section
   =================================== */
.about-section {
    padding: var(--section-padding) 0;
    background: var(--gray-100);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-text h3 {
    font-size: 2.5rem;
    margin-bottom: 30px;
    color: var(--secondary-color);
}

.about-text p {
    margin-bottom: 20px;
}

.about-features {
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 15px;
    font-weight: 600;
    color: var(--gray-800);
}

.feature-item i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.image-wrapper {
    position: relative;
    height: 600px;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.floating-card {
    position: absolute;
    bottom: -30px;
    right: -30px;
    background: var(--white);
    padding: 30px 40px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 20px;
}

.floating-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.floating-card p {
    font-weight: 700;
    font-size: 1rem;
    color: var(--secondary-color);
}

/* ===================================
   Services Section
   =================================== */
.services-section {
    padding: var(--section-padding) 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.service-card {
    background: var(--white);
    padding: 50px 40px;
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-200);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

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

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card.featured {
    background: var(--gradient-dark);
    color: var(--white);
    border-color: var(--primary-color);
}

.service-card.featured h3,
.service-card.featured p,
.service-card.featured li {
    color: var(--white);
}

.featured-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--white);
    margin-bottom: 30px;
    transition: all var(--transition-normal);
}

.service-card:hover .service-icon {
    transform: rotateY(360deg);
}

.service-card h3 {
    font-size: 1.75rem;
    margin-bottom: 20px;
}

.service-card > p {
    margin-bottom: 30px;
    color: var(--gray-600);
}

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

.service-features li {
    padding: 12px 0;
    padding-left: 30px;
    position: relative;
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-200);
}

.service-features li:last-child {
    border-bottom: none;
}

.service-features li::before {
    content: '\f058';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--primary-color);
    font-weight: 600;
    transition: all var(--transition-normal);
}

.service-link:hover {
    gap: 15px;
}

/* ===================================
   Process Section
   =================================== */
.process-section {
    padding: var(--section-padding) 0;
}

.process-timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.process-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
    transform: translateX(-50%);
}

.process-item {
    display: grid;
    grid-template-columns: 1fr 80px 1fr;
    gap: 40px;
    margin-bottom: 80px;
    align-items: center;
}

/* 홀수 아이템 (1, 3, 5): 왼쪽에 내용, 가운데 번호 */
.process-item:nth-child(odd) .process-content {
    grid-column: 1;
    text-align: right;
    padding-right: 20px;
}

.process-item:nth-child(odd) .process-number {
    grid-column: 2;
}

/* 짝수 아이템 (2, 4, 6): 가운데 번호, 오른쪽에 내용 */
.process-item:nth-child(even) .process-number {
    grid-column: 2;
}

.process-item:nth-child(even) .process-content {
    grid-column: 3;
    text-align: left;
    padding-left: 20px;
}

.process-number {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 800;
    font-family: var(--font-heading);
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 1;
}

.process-content h3 {
    font-size: 1.75rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.process-content p {
    color: var(--gray-600);
    line-height: 1.8;
}

/* ===================================
   Testimonials Section
   =================================== */
.testimonials-section {
    padding: var(--section-padding) 0;
    background: var(--gray-100);
}

.testimonials-slider {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.testimonial-card {
    background: var(--white);
    padding: 50px 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.testimonial-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.testimonial-rating {
    display: flex;
    gap: 5px;
    margin-bottom: 25px;
}

.testimonial-rating i {
    color: var(--accent-gold);
    font-size: 1.25rem;
}

.testimonial-text {
    font-size: 1.125rem;
    font-style: italic;
    color: var(--gray-700);
    margin-bottom: 30px;
    line-height: 1.8;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 20px;
}

.author-avatar {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
}

.author-info h4 {
    font-size: 1.125rem;
    margin-bottom: 5px;
    color: var(--secondary-color);
}

.author-info p {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* ===================================
   Contact Section
   =================================== */
.contact-section {
    padding: var(--section-padding) 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 80px;
}

.contact-info h3 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.contact-info > p {
    margin-bottom: 50px;
    color: var(--gray-600);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 40px;
    margin-bottom: 50px;
}

.contact-item {
    display: flex;
    gap: 20px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--white);
    flex-shrink: 0;
}

.contact-text h4 {
    font-size: 1.125rem;
    margin-bottom: 8px;
    color: var(--secondary-color);
}

.contact-text p {
    font-size: 1rem;
    color: var(--gray-600);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    width: 45px;
    height: 45px;
    background: var(--gray-200);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary-color);
    transition: all var(--transition-normal);
}

.social-link:hover {
    background: var(--gradient-primary);
    color: var(--white);
    transform: translateY(-3px);
}

.contact-form {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 16px 20px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--gray-800);
    background: var(--white);
    transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(201, 169, 97, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.submit-btn {
    grid-column: 1 / -1;
    justify-self: start;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 80px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 30px;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.footer-social .social-link {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.footer-social .social-link:hover {
    background: var(--gradient-primary);
}

.footer-column h3 {
    font-size: 1.25rem;
    margin-bottom: 25px;
    color: var(--white);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: all var(--transition-normal);
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.newsletter-form {
    display: flex;
    margin-top: 20px;
}

.newsletter-form input {
    flex: 1;
    padding: 14px 20px;
    border: none;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    font-family: var(--font-body);
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.newsletter-form button {
    padding: 14px 25px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--white);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.newsletter-form button:hover {
    background: var(--primary-dark);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 40px 0;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom-links {
    display: flex;
    gap: 30px;
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-normal);
}

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

/* ===================================
   Back to Top Button
   =================================== */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 55px;
    height: 55px;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1200px) {
    .hero-title { font-size: 4rem; }
    .section-title { font-size: 3rem; }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 992px) {
    :root {
        --section-padding: 80px;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--white);
        flex-direction: column;
        padding: 40px;
        gap: 20px;
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hero-title { font-size: 3rem; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .about-content { grid-template-columns: 1fr; }
    .contact-content { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: repeat(2, 1fr); }
    .testimonials-slider { grid-template-columns: 1fr; }

    .process-timeline::before { display: none; }
    .process-item {
        grid-template-columns: 80px 1fr;
        gap: 30px;
    }

    /* 모바일에서는 모든 아이템 동일하게 정렬 */
    .process-item:nth-child(odd) .process-content,
    .process-item:nth-child(even) .process-content {
        grid-column: 2;
        text-align: left;
        padding-left: 0;
        padding-right: 0;
    }

    .process-item:nth-child(odd) .process-number,
    .process-item:nth-child(even) .process-number {
        grid-column: 1;
    }
}

@media (max-width: 768px) {
    .container { padding: 0 20px; }
    .hero-title { font-size: 2.5rem; }
    .section-title { font-size: 2.5rem; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .hero-stats { grid-template-columns: 1fr; gap: 40px; }
    .services-grid { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 20px; text-align: center; }
    .contact-form { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2rem; }
    .section-title { font-size: 2rem; }
    .stat-number { font-size: 2.5rem; }
}