html {
    scroll-behavior: smooth;
}

/* 북유럽 미니멀리즘 + 스카니아 컬러 팔레트 */
:root {
    --bg-main: #121a23; /* 깊고 고급스러운 다크 네이비 */
    --bg-card: #1a2530; /* 카드 배경 */
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --scania-blue: #005596;
    --scania-red: #d6001c;
    --scania-yellow: #f2c500;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    letter-spacing: -0.02em;
    padding-bottom: 70px;
}

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

/* 1. 헤더 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background-color: rgba(18, 26, 35, 0.9);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 0.02em;
}
.logo span {
    color: var(--scania-blue);
}

.nav-menu ul {
    list-style: none;
    display: flex;
    gap: 40px;
}
.nav-menu a {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
}
.nav-menu a:hover {
    color: var(--scania-yellow);
}

.btn-call-header {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--scania-blue);
    padding: 10px 24px;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 2px;
    transition: all 0.3s ease;
}
.btn-call-header:hover {
    background-color: var(--scania-blue);
}

/* 2. 메인 비주얼 (Hero) */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    background: url('sungwoo_01.webp') no-repeat center center/cover;
    display: flex;
    align-items: center;
    padding: 0 40px;
}

.hero-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    /* 왼쪽을 어둡게 하여 글씨 가독성 확보 */
    background: linear-gradient(to right, rgba(18, 26, 35, 0.9) 0%, rgba(18, 26, 35, 0.3) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-content h2.sub-title {
    font-size: 1.1rem;
    color: var(--scania-yellow);
    letter-spacing: 0.15em;
    margin-bottom: 20px;
    font-weight: 600;
}

.hero-content h1 {
    font-size: 4.5rem;
    line-height: 1.15;
    font-weight: 800;
    margin-bottom: 30px;
}

.hero-content h1 span {
    color: var(--scania-blue);
}

.hero-content p.main-desc {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 15px;
}

.hero-content p.sub-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 300;
}

/* 3. 서비스 섹션 */
.services {
    padding: 120px 40px;
    background-color: var(--bg-main);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}
.section-tag {
    font-size: 0.9rem;
    color: var(--scania-yellow);
    letter-spacing: 0.15em;
    font-weight: 600;
    display: block;
    margin-bottom: 10px;
}
.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
}

.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.card {
    background-color: var(--bg-card);
    padding: 50px 40px;
    border-radius: 4px;
    border-top: 2px solid transparent;
    transition: all 0.4s ease;
}
.card:hover {
    transform: translateY(-10px);
    border-top: 2px solid var(--scania-blue);
    background-color: #1e2b38;
}

.card-number {
    font-size: 3rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.1);
    margin-bottom: 20px;
    line-height: 1;
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.card p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
    font-weight: 300;
}

/* 4. 역동적 현장 이미지 배너 (Parallax Effect) */
.featured-banner {
    position: relative;
    padding: 150px 40px;
    background: url('sungwoo_02.webp') no-repeat center center/cover;
    background-attachment: fixed; /* 스크롤 시 배경이 고정되는 고급스러운 효과 */
    text-align: center;
}



.featured-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(0, 0, 0, 0.6); /* 어두운 오버레이로 글씨 강조 */
}

.featured-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.featured-content h2 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.featured-content p {
    font-size: 1.2rem;
    color: #e2e8f0;
    font-weight: 400;
}

/* 5. 푸터 */
.footer {
    padding: 100px 40px 40px;
    background-color: #0b1016;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto 60px;
    display: flex;
    gap: 60px;
    flex-wrap: wrap;
}

.info-section {
    flex: 1;
    min-width: 300px;
}

.footer-logo {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 20px;
}
.footer-logo span {
    color: var(--scania-blue);
}

.address {
    font-size: 1.05rem;
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.contact-info p {
    margin-bottom: 10px;
    font-size: 1rem;
    color: var(--text-secondary);
}
.contact-info strong {
    color: var(--text-primary);
}

.highlight-text {
    color: var(--scania-yellow) !important;
    font-weight: 500;
    margin-top: 30px;
}

.map-section {
    flex: 1;
    min-width: 300px;
}

.call-buttons {
    display: flex;
    gap: 20px;
    max-width: 800px;
    margin: 0 auto 40px;
}

.btn-call-large {
    flex: 1;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 700;
    padding: 18px;
    border-radius: 4px;
    transition: all 0.3s;
}

.btn-call-large.primary {
    background-color: var(--scania-blue);
    color: var(--text-primary);
}
.btn-call-large.primary:hover {
    background-color: #00447a;
}

.btn-call-large.secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid #333;
}
.btn-call-large.secondary:hover {
    border-color: var(--scania-red);
    color: var(--scania-red);
}

.copyright {
    text-align: center;
    color: #4a5568;
    font-size: 0.9rem;
    border-top: 1px solid #1a202c;
    padding-top: 30px;
}

/* 모바일 하단 고정 바 */
.mobile-bottom-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--scania-blue);
    padding: 18px 0;
    text-align: center;
    z-index: 9999;
    box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.4);
}

.mobile-bottom-bar a {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 700;
    display: block;
}

/* 반응형 */
@media (max-width: 768px) {
    .header { height: 70px; padding: 0 20px; }
    .nav-menu, .btn-call-header { display: none; }
    
    .hero { padding: 0 20px; justify-content: center; text-align: center; }
    .hero-overlay { background: rgba(18, 26, 35, 0.7); }
    .hero-content h1 { font-size: 2.8rem; }
    
    .services { padding: 80px 20px; }
    .section-header h2 { font-size: 2rem; }
    
    .featured-banner { padding: 100px 20px; background-attachment: scroll; }
    .featured-content h2 { font-size: 2.2rem; }
    
    .footer { padding: 60px 20px; text-align: center; }
    .call-buttons { display: none; }
    .mobile-bottom-bar { display: block; }
}