/* ==========================================================================
   Variables & Reset
   ========================================================================== */
:root {
    --primary-color: #d4af37;
    /* Premium Gold */
    --primary-hover: #b5952f;
    --bg-dark: #0a0a0a;
    /* Deep Black */
    --bg-card: #141414;
    /* Slightly lighter for cards */
    --text-white: #ffffff;
    --text-gray: #a0a0a0;
    --text-dark: #333333;
    --font-main: 'Noto Sans KR', sans-serif;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* ==========================================================================
   Typography & Utilities
   ========================================================================== */
.text-gold {
    color: var(--primary-color);
}

.text-center {
    text-center: center;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
}

.section-title {
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.section-title p {
    color: var(--text-gray);
    font-size: 1.1rem;
}

.subtitle {
    display: block;
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.btn {
    display: inline-block;
    padding: 15px 30px;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--bg-dark);
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--primary-color);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-white);
    border: 2px solid var(--text-gray);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.9rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background-color: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header.scrolled {
    height: 70px;
    background-color: var(--bg-dark);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo a {
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 2px;
}

.logo span {
    color: var(--primary-color);
}

.nav-list {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-link {
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
}

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

.nav-link.highlight {
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 8px 20px;
    border-radius: 30px;
}

.nav-link.highlight:hover {
    background-color: var(--primary-color);
    color: var(--bg-dark);
}

.hamburger {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 30px;
    height: 2px;
    background-color: var(--text-white);
    transition: var(--transition);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(to bottom, rgba(10, 10, 10, 0.3) 0%, rgba(10, 10, 10, 1) 100%),
        url('https://images.unsplash.com/photo-1453928582365-b6ad33cbcf64?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
    padding-top: 80px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.badge {
    display: inline-block;
    padding: 6px 15px;
    background-color: rgba(212, 175, 55, 0.1);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.hero h2 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

/* ==========================================================================
   Stats Section
   ========================================================================== */
.stats {
    padding: 50px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.stats-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 5px;
    line-height: 1;
}

.stat-item p {
    color: var(--text-gray);
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ==========================================================================
   Services Section
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background-color: var(--bg-card);
    padding: 50px 40px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: rgba(212, 175, 55, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-white);
}

.service-card p {
    color: var(--text-gray);
    font-size: 1rem;
    line-height: 1.8;
}

/* ==========================================================================
   Network Section
   ========================================================================== */
.network {
    background-color: var(--bg-card);
    position: relative;
}

.network-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.check-list {
    margin-top: 30px;
}

.check-list li {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 15px;
    color: var(--text-gray);
    font-size: 1.1rem;
}

.check-list span {
    color: var(--primary-color);
    font-weight: bold;
}

.map-placeholder {
    width: 100%;
    aspect-ratio: 1;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.05) 0%, rgba(20, 20, 20, 1) 70%);
    border: 1px solid rgba(212, 175, 55, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.map-text {
    color: rgba(255, 255, 255, 0.2);
    font-size: 1.5rem;
    font-weight: bold;
    letter-spacing: 5px;
}

.pulse-point {
    position: absolute;
    width: 10px;
    height: 10px;
    background-color: var(--primary-color);
    border-radius: 50%;
}

.pulse-point::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    background-color: rgba(212, 175, 55, 0.4);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 1;
    }

    100% {
        transform: translate(-50%, -50%) scale(2);
        opacity: 0;
    }
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.contact-info {
    text-align: center;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.contact-info h2 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.contact-info p {
    color: var(--text-gray);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

.method-box {
    background-color: var(--bg-card);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
}

.method-box h4 {
    color: var(--text-gray);
    font-size: 0.9rem;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.method-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color) !important;
    margin-bottom: 20px !important;
}

.contact-form-wrapper {
    background-color: var(--bg-card);
    padding: 50px;
    border-radius: 8px;
    border: 1px solid rgba(212, 175, 55, 0.2);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 500;
    color: var(--text-gray);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px;
    background-color: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-white);
    border-radius: 4px;
    font-family: var(--font-main);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: rgba(0, 0, 0, 0.8);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 30px;
}

.checkbox-group label {
    color: var(--text-gray);
    font-size: 0.9rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: #000;
    padding: 80px 0 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-container {
    display: flex;
    justify-content: space-between;
}

.footer-info {
    max-width: 500px;
}

.footer-logo {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 20px;
}

.footer-logo span {
    color: var(--primary-color);
}

.footer-info p {
    color: var(--text-gray);
    font-size: 0.9rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

.copyright {
    color: rgba(255, 255, 255, 0.3) !important;
}

.footer-links h4 {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    color: var(--text-gray);
    transition: var(--transition);
}

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

/* ==========================================================================
   Animations & Responsive
   ========================================================================== */
.fade-up {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Tablet */
@media (max-width: 1024px) {
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .network-container,
    .contact-container {
        grid-template-columns: 1fr;
    }

    .contact-info {
        text-align: center;
    }

    .contact-methods {
        flex-direction: row;
    }

    .method-box {
        flex: 1;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background-color: var(--bg-card);
        padding: 100px 30px;
        transition: var(--transition);
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.5);
    }

    .nav.active {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
    }

    .hamburger.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero h2 {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .contact-methods {
        flex-direction: column;
    }

    .footer-container {
        flex-direction: column;
        gap: 40px;
    }
}

.hero-fade-in {
    animation: heroFadeIn 1s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

@keyframes heroFadeIn {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}