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

:root {
    /* Professional Trust Colors */
    --primary-color: #1e3a8a;        /* Deep Navy Blue - 신뢰감 */
    --secondary-color: #0f172a;      /* Rich Dark Blue - 전문성 */
    --accent-color: #d97706;         /* Warm Amber - 안정감 */
    --success-color: #059669;        /* Professional Green */
    
    /* Neutral Colors */
    --text-dark: #0f172a;
    --text-medium: #334155;
    --text-light: #64748b;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-subtle: #f1f5f9;
    --border-color: #e2e8f0;
    
    /* Shadows - Subtle & Professional */
    --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.08);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.1), 0 2px 4px -1px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -2px rgba(15, 23, 42, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 10px 10px -5px rgba(15, 23, 42, 0.04);
    
    /* Trust Badge Colors */
    --badge-blue: #3b82f6;
    --badge-green: #10b981;
    --badge-amber: #f59e0b;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-dark);
    line-height: 1.7;
    background-color: var(--bg-white);
    font-weight: 400;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

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

/* ===================================
   Floating Action Bar - Professional
   =================================== */
.floating-bar {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 1000;
}

.float-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    border-radius: 12px;
    color: white;
    font-weight: 600;
    font-size: 15px;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    white-space: nowrap;
    backdrop-filter: blur(10px);
}

.float-btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.float-btn i {
    font-size: 20px;
}

.phone-btn {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
}

.phone-btn:hover {
    background: linear-gradient(135deg, #047857 0%, #065f46 100%);
}

.naver-btn {
    background: linear-gradient(135deg, #03c75a 0%, #00a844 100%);
}

.naver-btn:hover {
    background: linear-gradient(135deg, #00a844 0%, #008c38 100%);
}

.inquiry-btn {
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
}

.inquiry-btn:hover {
    background: linear-gradient(135deg, #1e40af 0%, #1d4ed8 100%);
}

/* ===================================
   Header - Professional & Clean
   =================================== */
.header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 3px 0 rgba(15, 23, 42, 0.1);
    position: sticky;
    top: 0;
    z-index: 999;
    border-bottom: 1px solid var(--border-color);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.logo i {
    font-size: 28px;
}

.nav {
    display: flex;
    gap: 36px;
}

.nav a {
    color: var(--text-medium);
    font-weight: 500;
    font-size: 15px;
    position: relative;
    padding: 8px 0;
    letter-spacing: -0.2px;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

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

.mobile-menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--primary-color);
}

/* ===================================
   Hero Section - Trust & Authority
   =================================== */
.hero {
    position: relative;
    min-height: 680px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 58, 138, 0.9) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 80px 24px;
    color: white;
}

.hero-title {
    font-size: 52px;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.2;
    letter-spacing: -1px;
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 26px;
    font-weight: 600;
    margin-bottom: 16px;
    opacity: 0.95;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-description {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

.hero-image {
    position: absolute;
    right: 0;
    top: 0;
    width: 50%;
    height: 100%;
    overflow: hidden;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.2;
}

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

/* ===================================
   Buttons - Professional Design
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    letter-spacing: -0.2px;
}

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

.btn-primary:hover {
    background: #b45309;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid white;
    box-shadow: var(--shadow-md);
}

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

/* ===================================
   Section Styles
   =================================== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    font-weight: 400;
}

/* ===================================
   About Section - Trust Building
   =================================== */
.about {
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 70px;
    align-items: center;
}

.about-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    position: relative;
}

.about-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.1) 100%);
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.about-image:hover img {
    transform: scale(1.03);
}

.about-text h3 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.about-text p {
    font-size: 17px;
    color: var(--text-medium);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 40px;
}

.feature-item {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.feature-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--primary-color);
}

.feature-item i {
    font-size: 32px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.feature-item h4 {
    font-size: 18px;
    margin-bottom: 6px;
    color: var(--text-dark);
    font-weight: 700;
}

.feature-item p {
    font-size: 14px;
    color: var(--text-light);
    margin: 0;
    line-height: 1.6;
}

/* ===================================
   Services Section - Professional Grid
   =================================== */
.services {
    background: white;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.service-card {
    background: var(--bg-light);
    padding: 40px 32px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
}

.service-card:hover {
    background: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}

.service-icon {
    width: 90px;
    height: 90px;
    margin: 0 auto 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), #1e40af);
    border-radius: 20px;
    color: white;
    font-size: 40px;
    box-shadow: var(--shadow-md);
}

.service-card h3 {
    font-size: 22px;
    margin-bottom: 16px;
    color: var(--text-dark);
    font-weight: 700;
}

.service-card p {
    font-size: 15px;
    color: var(--text-medium);
    margin-bottom: 24px;
    line-height: 1.7;
}

.service-card ul {
    list-style: none;
    text-align: left;
}

.service-card ul li {
    padding: 10px 0;
    color: var(--text-medium);
    font-size: 14px;
    position: relative;
    padding-left: 28px;
}

.service-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
    font-size: 16px;
}

/* ===================================
   Properties Section - Trust Design
   =================================== */
.properties {
    background: var(--bg-light);
}

.properties-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 60px;
}

.property-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
}

.property-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-8px);
    border-color: var(--primary-color);
}

.property-image {
    position: relative;
    height: 280px;
    overflow: hidden;
    background: var(--bg-subtle);
}

.property-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.property-card:hover .property-image img {
    transform: scale(1.08);
}

.property-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--primary-color);
    color: white;
    padding: 8px 20px;
    border-radius: 24px;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-md);
}

.property-badge.rental {
    background: var(--success-color);
}

.property-badge.commercial {
    background: var(--accent-color);
}

.property-info {
    padding: 28px;
}

.property-info h3 {
    font-size: 21px;
    margin-bottom: 12px;
    color: var(--text-dark);
    font-weight: 700;
    letter-spacing: -0.3px;
}

.property-location {
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 12px;
    font-weight: 500;
}

.property-location i {
    color: var(--primary-color);
    margin-right: 4px;
}

.property-description {
    font-size: 15px;
    color: var(--text-medium);
    margin-bottom: 20px;
    line-height: 1.7;
}

.property-details {
    display: flex;
    gap: 16px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.property-details span {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-medium);
    font-weight: 600;
}

.property-details i {
    color: var(--primary-color);
    font-size: 14px;
}

.properties-cta {
    text-align: center;
    padding: 50px;
    background: white;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    border: 2px solid var(--border-color);
}

.properties-cta p {
    font-size: 19px;
    color: var(--text-dark);
    margin-bottom: 24px;
    font-weight: 600;
}

/* ===================================
   Why Choose Section - Authority
   =================================== */
.why-choose {
    background: white;
}

.reasons-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.reason-card {
    text-align: center;
    padding: 44px 24px;
    background: var(--bg-light);
    border-radius: 20px;
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
}

.reason-card:hover {
    background: white;
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
    border-color: var(--primary-color);
}

.reason-number {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 56px;
    font-weight: 900;
    color: rgba(30, 58, 138, 0.08);
}

.reason-card i {
    font-size: 52px;
    color: var(--primary-color);
    margin-bottom: 24px;
}

.reason-card h3 {
    font-size: 22px;
    margin-bottom: 16px;
    color: var(--text-dark);
    font-weight: 700;
}

.reason-card p {
    font-size: 15px;
    color: var(--text-medium);
    line-height: 1.7;
}

/* ===================================
   Contact Section - Professional
   =================================== */
.contact {
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-card {
    display: flex;
    gap: 20px;
    padding: 28px;
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.contact-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    border-color: var(--primary-color);
}

.contact-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), #1e40af);
    border-radius: 14px;
    color: white;
    font-size: 26px;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.contact-details h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-dark);
    font-weight: 700;
}

.contact-details a {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 16px;
}

.contact-details a:hover {
    text-decoration: underline;
}

.contact-details p {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 6px;
}

.contact-map {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.map-container {
    width: 100%;
    height: 480px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.map-buttons {
    display: flex;
    justify-content: center;
}

/* ===================================
   Footer - Professional & Clean
   =================================== */
.footer {
    background: var(--secondary-color);
    color: white;
    padding: 70px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 50px;
    margin-bottom: 50px;
}

.footer-section h3 {
    font-size: 20px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
    font-weight: 700;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 12px;
    font-size: 14px;
    line-height: 1.6;
}

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

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.75);
    font-size: 14px;
    transition: all 0.2s ease;
}

.footer-section ul li a:hover {
    color: white;
    padding-left: 5px;
}

.footer-section ul li i {
    margin-right: 8px;
    color: var(--accent-color);
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.footer-social a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.footer-social a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    margin-bottom: 6px;
    line-height: 1.6;
}

/* ===================================
   Scroll to Top Button
   =================================== */
.scroll-top {
    position: fixed;
    bottom: 200px;
    right: 30px;
    width: 52px;
    height: 52px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 14px;
    cursor: pointer;
    font-size: 20px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
}

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

.scroll-top:hover {
    background: var(--secondary-color);
    transform: translateY(-4px);
}

/* ===================================
   Responsive Design
   =================================== */

/* Tablet */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 42px;
    }
    
    .hero-subtitle {
        font-size: 22px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .about-content {
        gap: 50px;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .properties-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .reasons-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .header-content {
        padding: 16px 0;
    }
    
    .nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: white;
        flex-direction: column;
        padding: 40px;
        gap: 24px;
        box-shadow: var(--shadow-lg);
        transition: left 0.3s ease;
    }
    
    .nav.active {
        left: 0;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero {
        min-height: 540px;
    }
    
    .hero-content {
        padding: 50px 20px;
    }
    
    .hero-title {
        font-size: 34px;
    }
    
    .hero-subtitle {
        font-size: 19px;
    }
    
    .hero-description {
        font-size: 16px;
    }
    
    .hero-image {
        width: 100%;
        opacity: 0.12;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 30px;
    }
    
    .section-subtitle {
        font-size: 16px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .properties-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .reasons-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .floating-bar {
        bottom: 20px;
        right: 20px;
    }
    
    .float-btn {
        padding: 14px 18px;
        font-size: 14px;
    }
    
    .float-btn span {
        display: none;
    }
    
    .float-btn i {
        font-size: 22px;
    }
    
    .scroll-top {
        bottom: 220px;
        right: 20px;
        width: 48px;
        height: 48px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 17px;
    }
    
    .section-title {
        font-size: 26px;
    }
    
    .btn {
        padding: 14px 24px;
        font-size: 15px;
    }
}