/* ========================================
   CSS Variables - 로고 색상 기반
======================================== */
:root {
    --primary-blue: #001F3F;
    --primary-orange: #FF6B35;
    --dark-blue: #000d1a;
    --light-blue: #003366;
    --accent-orange: #ff8552;
    --white: #ffffff;
    --light-gray: #f5f5f5;
    --medium-gray: #e0e0e0;
    --text-dark: #1a1a1a;
    --text-medium: #4a4a4a;
    --text-light: #7a7a7a;
    
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Noto Sans KR', sans-serif;
    
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
    scroll-behavior: smooth;
}

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

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

/* ========================================
   네비게이션
======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 31, 63, 0.95);
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar.scrolled {
    background: rgba(0, 31, 63, 1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

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

.logo {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 800;
    color: var(--white);
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--white) 0%, var(--primary-orange) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-img {
    height: 44px;
    width: auto;
    object-fit: contain;
    display: block;
}

.nav-links {
    display: flex;
    gap: 40px;
    align-items: center;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--white);
    text-decoration: none;
    position: relative;
    transition: var(--transition-smooth);
    padding: 8px 0;
}

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

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

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

.cta-link {
    background: var(--primary-orange);
    padding: 10px 24px;
    border-radius: 25px;
    color: var(--white) !important;
}

.cta-link::after {
    display: none;
}

.cta-link:hover {
    background: var(--accent-orange);
    color: var(--white) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.4);
}

/* 햄버거 메뉴 */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--white);
    transition: var(--transition-smooth);
    border-radius: 2px;
}

/* ========================================
   히어로 섹션
======================================== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 50%, var(--light-blue) 100%);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 107, 53, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255, 107, 53, 0.05) 0%, transparent 50%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    animation: fadeInUp 1s ease-out;
}

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

.hero-title {
    font-family: var(--font-heading);
    font-size: 72px;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 24px;
    line-height: 1.2;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.hero-title-line {
    display: block;
    animation: slideIn 0.8s ease-out backwards;
}

.hero-title-line:nth-child(1) {
    animation-delay: 0.2s;
}

.hero-title-line:nth-child(2) {
    animation-delay: 0.4s;
    background: linear-gradient(90deg, var(--white) 0%, var(--primary-orange) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-subtitle {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    animation: fadeIn 1s ease-out 0.6s backwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeIn 1s ease-out 0.8s backwards;
}

/* 스크롤 인디케이터 */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--white);
    font-size: 12px;
    letter-spacing: 2px;
    animation: bounce 2s infinite;
}

.scroll-line {
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, transparent, var(--primary-orange));
}

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

/* ========================================
   버튼 스타일
======================================== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: var(--transition-smooth);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--accent-orange);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 107, 53, 0.4);
}

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

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-blue);
    transform: translateY(-3px);
}

.btn-large {
    padding: 18px 48px;
    font-size: 18px;
}

/* ========================================
   섹션 공통 스타일
======================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--primary-orange);
}

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

/* ========================================
   핵심 가치 섹션
======================================== */
.values-section {
    padding: 100px 0;
    background: var(--light-gray);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.value-card {
    background: var(--white);
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.value-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 40px rgba(0, 31, 63, 0.15);
}

.value-icon {
    width: 160px;
    height: 160px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    overflow: hidden;
}

.value-title {
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 16px;
}

.value-description {
    font-size: 16px;
    color: var(--text-medium);
    line-height: 1.8;
}

/* ========================================
   사업분야 미리보기
======================================== */
.services-preview {
    padding: 100px 0;
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    border: 2px solid var(--medium-gray);
    padding: 40px;
    border-radius: 12px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-orange));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-smooth);
}

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

.service-card:hover {
    border-color: var(--primary-orange);
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(255, 107, 53, 0.2);
}

.service-number {
    font-family: var(--font-heading);
    font-size: 48px;
    font-weight: 800;
    color: var(--primary-orange);
    opacity: 0.2;
    margin-bottom: 16px;
}

.service-title {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 12px;
}

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

.service-link {
    color: var(--primary-orange);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition-smooth);
}

.service-link:hover {
    color: var(--accent-orange);
    transform: translateX(5px);
    display: inline-block;
}

/* ========================================
   CTA 섹션
======================================== */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 50%, rgba(255, 107, 53, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(255, 107, 53, 0.05) 0%, transparent 50%);
}

.cta-content {
    position: relative;
    z-index: 10;
    text-align: center;
}

.cta-title {
    font-family: var(--font-heading);
    font-size: 42px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.cta-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.contact-info {
    display: flex;
    gap: 40px;
    color: var(--white);
    font-size: 16px;
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ========================================
   푸터
======================================== */
.footer {
    background: var(--dark-blue);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--white) 0%, var(--primary-orange) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
}

.footer-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links,
.footer-contact {
    list-style: none;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition-smooth);
    font-size: 15px;
}

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

.footer-contact li {
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* ========================================
   반응형 디자인
======================================== */
@media (max-width: 968px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(0, 31, 63, 0.98);
        flex-direction: column;
        justify-content: flex-start;
        padding: 40px 0;
        transition: var(--transition-smooth);
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-title {
        font-size: 48px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .cta-title {
        font-size: 32px;
    }
    
    .contact-info {
        flex-direction: column;
        gap: 12px;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .values-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
}