/* ============================
   CSS Variables & Reset
   ============================ */
:root {
    /* Colors - Black & White Theme */
    --color-primary: #ffffff;
    --color-secondary: #f8f8f8;
    --color-accent: #000000;
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray-light: #f5f5f5;
    --color-gray: #666666;
    --color-gray-dark: #333333;
    
    /* Fonts */
    --font-primary: 'Noto Sans KR', sans-serif;
    --font-secondary: 'Montserrat', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* 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, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-primary);
    color: var(--color-black);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ============================
   Container & Layout
   ============================ */
.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(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    transition: var(--transition-normal);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-brand .logo {
    height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
}

.nav-menu a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-black);
    transition: var(--transition-fast);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-black);
    transition: var(--transition-normal);
}

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

.nav-toggle {
    display: none;
    font-size: 1.5rem;
    color: var(--color-black);
}

/* ============================
   Hero Section
   ============================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.92);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
    animation: fadeInUp 1s ease;
}

.hero-logo {
    margin-bottom: var(--spacing-lg);
}

.hero-logo img {
    height: 120px;
    width: auto;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.5rem;
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid var(--color-black);
    border-radius: 50px;
    font-family: var(--font-secondary);
    font-size: 0.85rem;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    font-family: var(--font-secondary);
}

.gold-text {
    color: var(--color-black);
    display: inline-block;
    font-weight: 900;
}

.accent-text {
    color: var(--color-black);
    display: inline-block;
    font-weight: 900;
}

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

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

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

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-black);
    font-family: var(--font-secondary);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-gray);
    margin-top: 0.5rem;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.5rem;
    color: var(--color-black);
    animation: bounce 2s infinite;
}

/* ============================
   Buttons
   ============================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    transition: var(--transition-normal);
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.btn-primary:hover {
    background: var(--color-gray-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--color-black);
    border: 2px solid var(--color-black);
}

.btn-secondary:hover {
    background: var(--color-black);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.1rem;
}

.btn-kakao {
    background: #FEE500;
    color: #000000;
    border: none;
}

.btn-kakao:hover {
    background: #FDD835;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(254, 229, 0, 0.3);
}

.btn-kakao i {
    color: #000000;
}

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-subtitle {
    display: inline-block;
    font-family: var(--font-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-black);
    letter-spacing: 3px;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.section-description {
    font-size: 1.1rem;
    color: var(--color-gray);
    line-height: 1.8;
}

/* ============================
   Services Section
   ============================ */
.services {
    background: var(--color-secondary);
}

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

.service-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    transition: var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--color-black);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--color-black);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    font-size: 2rem;
    color: var(--color-white);
}

.service-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.service-description {
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    font-size: 1rem;
}

.service-features {
    list-style: none;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: var(--color-black);
    font-size: 1rem;
    font-weight: 500;
}

.service-features i {
    color: var(--color-black);
    font-size: 1rem;
    font-weight: 700;
    flex-shrink: 0;
}

/* ============================
   Gallery Section
   ============================ */
.gallery {
    background: var(--color-white);
}

.gallery-filter {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    background: transparent;
    color: var(--color-black);
    border: 1px solid var(--color-gray);
    border-radius: 50px;
    font-weight: 500;
    transition: var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-black);
}

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

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    cursor: pointer;
}

.gallery-image {
    position: relative;
    height: 300px;
    overflow: hidden;
}

.gallery-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-item:hover .gallery-image img {
    transform: scale(1.1);
}

.gallery-content {
    text-align: center;
    padding: var(--spacing-md);
}

.gallery-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-black);
}

.gallery-content p {
    color: var(--color-gray);
    margin-bottom: var(--spacing-sm);
}

.btn-view {
    width: 50px;
    height: 50px;
    background: var(--color-black);
    color: var(--color-white);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-fast);
    margin-top: var(--spacing-sm);
}

.btn-view:hover {
    transform: scale(1.1);
}

/* ============================
   Process Section
   ============================ */
.process {
    background: var(--color-secondary);
}

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

.process-step {
    text-align: center;
    padding: var(--spacing-md);
}

.step-number {
    width: 80px;
    height: 80px;
    background: var(--color-black);
    color: var(--color-white);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-secondary);
    margin-bottom: var(--spacing-sm);
}

.step-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.step-content p {
    color: var(--color-gray);
}

/* ============================
   Testimonials Section
   ============================ */
.testimonials {
    background: var(--color-white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.testimonial-card {
    background: var(--color-secondary);
    padding: var(--spacing-lg);
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    transition: var(--transition-normal);
}

.testimonial-card:hover {
    border-color: var(--color-black);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.testimonial-rating {
    margin-bottom: var(--spacing-sm);
}

.testimonial-rating i {
    color: var(--color-black);
    font-size: 1rem;
    margin-right: 0.25rem;
}

.testimonial-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-md);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.author-info h4 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.author-info span {
    font-size: 0.9rem;
    color: var(--color-gray);
}

/* ============================
   CTA Section
   ============================ */
.cta {
    background: var(--color-black);
    padding: var(--spacing-xl) 0;
    color: var(--color-white);
}

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

.cta-title {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
}

.cta-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-gray-light);
}

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

.cta-buttons .btn-primary {
    background: var(--color-white);
    color: var(--color-black);
}

.cta-buttons .btn-primary:hover {
    background: var(--color-gray-light);
}

.cta-buttons .btn-secondary {
    background: transparent;
    border-color: var(--color-white);
    color: var(--color-white);
}

.cta-buttons .btn-secondary:hover {
    background: var(--color-white);
    color: var(--color-black);
}

.cta-info {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-gray-light);
    font-weight: 500;
}

.info-item i {
    font-size: 1.25rem;
}

/* ============================
   Contact Section
   ============================ */
.contact {
    background: var(--color-secondary);
}

.contact-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.contact-form {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

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

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

.form-group label {
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--color-black);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 1rem;
    background: var(--color-secondary);
    border: 1px solid var(--color-gray);
    border-radius: 5px;
    color: var(--color-black);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-black);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form button[type="submit"] {
    grid-column: 1 / -1;
    margin-top: var(--spacing-sm);
}

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

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

.footer-section h3,
.footer-section h4 {
    color: var(--color-black);
    margin-bottom: var(--spacing-sm);
}

.footer-title img {
    height: 50px;
    width: auto;
}

.footer-description {
    color: var(--color-gray);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: var(--color-secondary);
    border: 1px solid var(--color-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.footer-social a:hover {
    background: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-black);
}

.footer-links li,
.footer-info li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--color-gray);
    transition: var(--transition-fast);
}

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

.footer-info li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-gray);
}

.footer-info i {
    color: var(--color-black);
    width: 20px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--color-gray);
    font-size: 0.9rem;
}

.footer-bottom p {
    margin-bottom: 0.5rem;
}

/* ============================
   Scroll to Top Button
   ============================ */
.scroll-top {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 50px;
    height: 50px;
    background: var(--color-black);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-5px);
}

/* ============================
   Floating Kakao Talk Button
   ============================ */
.kakao-float {
    position: fixed;
    bottom: calc(var(--spacing-md) + 70px);
    right: var(--spacing-md);
    width: 60px;
    height: 60px;
    background: #FEE500;
    color: #000000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    transition: var(--transition-normal);
    z-index: 998;
    text-decoration: none;
}

.kakao-float:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 8px 30px rgba(254, 229, 0, 0.4);
}

.kakao-float i {
    color: #000000;
}

/* Kakao pulse animation */
@keyframes kakaoPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(254, 229, 0, 0.7);
    }
    70% {
        box-shadow: 0 0 0 15px rgba(254, 229, 0, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(254, 229, 0, 0);
    }
}

.kakao-float {
    animation: kakaoPulse 2s infinite;
}

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

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

@keyframes shimmer {
    0%, 100% {
        text-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
    }
    50% {
        text-shadow: 0 0 20px rgba(0, 0, 0, 0.4);
    }
}

/* ============================
   Responsive Design
   ============================ */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: var(--spacing-lg);
        transition: var(--transition-normal);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .services-grid,
    .gallery-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        grid-template-columns: 1fr;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .hero-buttons,
    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .btn,
    .cta-buttons .btn {
        width: 100%;
        justify-content: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .kakao-float {
        width: 55px;
        height: 55px;
        bottom: calc(var(--spacing-sm) + 65px);
        right: var(--spacing-sm);
        font-size: 1.3rem;
    }
    
    .scroll-top {
        width: 45px;
        height: 45px;
        bottom: var(--spacing-sm);
        right: var(--spacing-sm);
    }
}