:root {
    --amber: #E8A838;
    --blue: #3887BE;
    --dark: #2c3e50;
    --gray-bg: #f8f9fa;
    --text: #333;
    --text-light: #666;
    --indigo: #4A6FA5;
    --teal: #2BBFBF;
    --navy: #1a3a5c;
    --slate: #34495e;
    --steel: #3d5f5f;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ========== NAVIGATION ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
    padding: 1rem 0;
}

.navbar.transparent {
    background: transparent;
}

.navbar.scrolled {
    background: #fff;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    padding: 0.5rem 0;
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo img {
    height: 40px;
    transition: all 0.3s ease;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-menu a {
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.navbar.transparent .nav-menu a {
    color: rgba(255,255,255,0.9);
}

.navbar.transparent .nav-menu a:hover,
.navbar.transparent .nav-menu a.active {
    color: #fff;
    background: rgba(255,255,255,0.15);
}

.navbar.scrolled .nav-menu a {
    color: var(--text);
}

.navbar.scrolled .nav-menu a:hover,
.navbar.scrolled .nav-menu a.active {
    color: var(--amber);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    border-radius: 3px;
    transition: all 0.3s ease;
}

.navbar.transparent .hamburger span {
    background: #fff;
}

.navbar.scrolled .hamburger span {
    background: var(--dark);
}

.hamburger.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

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

.hamburger.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* ========== HERO ========== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: url('https://images.unsplash.com/photo-1558494949-ef010cbdcc31?w=1920&q=80') center/cover no-repeat;
    z-index: 0;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(26,58,92,0.88);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: 2rem;
}

.hero-logo {
    width: 180px;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.hero .subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    opacity: 0.9;
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-cta {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--amber);
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.hero-cta:hover {
    background: #d4962e;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(232,168,56,0.4);
}

.scroll-arrow {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    animation: bounce 2s infinite;
    color: rgba(255,255,255,0.7);
    font-size: 1.5rem;
    text-decoration: none;
}

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

/* ========== SECTION COMMON ========== */
.section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--amber);
    margin: 0.8rem auto 0;
}

.section-header p {
    color: var(--text-light);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ========== ABOUT ========== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.about-card {
    text-align: center;
    padding: 2.5rem 2rem;
    border-radius: 12px;
    transition: all 0.3s ease;
    background: #fff;
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.08);
}

.about-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--navy);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: #fff;
}

.about-card:nth-child(2) .about-icon {
    background: var(--slate);
}

.about-card:nth-child(3) .about-icon {
    background: var(--steel);
}

.about-card h3 {
    font-size: 1.2rem;
    color: var(--dark);
    margin-bottom: 1rem;
}

.about-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* ========== SOLUTIONS ========== */
.bg-light {
    background: var(--gray-bg);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.solution-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.06);
    transition: all 0.3s ease;
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}

.solution-icon-wrap {
    background: var(--navy);
    padding: 2.5rem 2rem;
    text-align: center;
}

.solution-card:nth-child(2) .solution-icon-wrap {
    background: var(--slate);
}

.solution-card:nth-child(3) .solution-icon-wrap {
    background: var(--steel);
}

.solution-icon-wrap i {
    font-size: 3rem;
    color: #fff;
}

.solution-icon-wrap h3 {
    color: #fff;
    font-size: 1.2rem;
    margin-top: 1rem;
}

.solution-body {
    padding: 2rem;
}

.solution-body ul {
    list-style: none;
}

.solution-body li {
    padding: 0.6rem 0;
    color: var(--text-light);
    font-size: 0.95rem;
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
}

.solution-body li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--amber);
    font-size: 0.85rem;
    margin-top: 3px;
    flex-shrink: 0;
}

/* ========== SERVICES ========== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.service-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.06);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}

.service-card-header {
    background: var(--navy);
    padding: 2rem;
    text-align: center;
}

.service-card:nth-child(2) .service-card-header {
    background: var(--slate);
}

.service-card:nth-child(3) .service-card-header {
    background: var(--steel);
}

.service-card-header i {
    font-size: 2.5rem;
    color: #fff;
    margin-bottom: 0.8rem;
    display: block;
}

.service-card-header h3 {
    color: #fff;
    font-size: 1.15rem;
}

.service-card-body {
    padding: 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.service-card-body p {
    min-height: 4.5em;
}

.service-card-body .service-detail-list {
    min-height: 9em;
}

.service-card-body .process-stepper {
    margin-top: auto;
    padding-top: 1.5rem;
    border-top: 1px solid #eee;
}

.service-card-body p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

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

.service-detail-list li {
    padding: 0.5rem 0;
    color: var(--text-light);
    font-size: 0.9rem;
    padding-left: 1.2rem;
    position: relative;
}

.service-detail-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--amber);
}

.process-stepper {
    margin-top: 1.5rem;
    padding-left: 0.5rem;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    position: relative;
    padding-bottom: 1.2rem;
}

.step-item:last-child {
    padding-bottom: 0;
}

.step-item:not(:last-child)::before {
    content: '';
    position: absolute;
    left: 13px;
    top: 28px;
    width: 2px;
    height: calc(100% - 22px);
    background: var(--navy);
    opacity: 0.5;
}

.step-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--navy);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.step-label {
    font-size: 0.9rem;
    color: var(--dark);
    font-weight: 500;
    padding-top: 4px;
}

/* ========== CONTACT ========== */
.contact-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info h3 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 1.5rem;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-info-item i {
    width: 40px;
    height: 40px;
    background: var(--navy);
    color: #fff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.contact-info-item strong {
    display: block;
    color: var(--dark);
    margin-bottom: 0.3rem;
    font-size: 0.95rem;
}

.contact-info-item p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.6;
}

.contact-info-item p a {
    color: inherit;
    text-decoration: none;
}

.contact-info-item p a:hover {
    color: var(--navy);
    text-decoration: underline;
}

.contact-form {
    background: #fff;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 5px 25px rgba(0,0,0,0.08);
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
    background: #fafafa;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--amber);
    background: #fff;
}

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

.form-group .error-msg {
    color: #e74c3c;
    font-size: 0.8rem;
    margin-top: 0.3rem;
    display: none;
}

.submit-btn {
    width: 100%;
    padding: 0.9rem;
    background: var(--navy);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.submit-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 5px 20px rgba(232,168,56,0.3);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* ========== LOCATION ========== */
.location-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.map-container {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    min-height: 450px;
}

.map-container iframe {
    width: 100%;
    height: 100%;
    min-height: 450px;
    border: 0;
}

.location-details {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.location-card {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.06);
}

.location-card h3 {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 1.5rem;
}

.loc-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.2rem;
}

.loc-item:last-child {
    margin-bottom: 0;
}

.loc-item i {
    width: 36px;
    height: 36px;
    background: var(--navy);
    color: #fff;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.loc-item strong {
    display: block;
    color: var(--dark);
    font-size: 0.9rem;
    margin-bottom: 0.2rem;
}

.loc-item p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.5;
}

.transport-card {
    background: var(--gray-bg);
    padding: 1.5rem;
    border-radius: 12px;
}

.transport-card h4 {
    font-size: 1.1rem;
    color: var(--dark);
    margin-bottom: 1rem;
}

.transport-item {
    margin-bottom: 0.8rem;
}

.transport-item:last-child {
    margin-bottom: 0;
}

.transport-item strong {
    color: var(--navy);
    font-size: 0.9rem;
}

.transport-item p {
    color: var(--text-light);
    font-size: 0.85rem;
    margin-top: 0.2rem;
}

/* ========== FOOTER ========== */
.footer {
    background: var(--dark);
    color: rgba(255,255,255,0.7);
    padding: 2rem 0;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.footer-company {
    font-size: 0.85rem;
    line-height: 1.8;
}

.footer-company span {
    margin-right: 1rem;
}

.footer-copy {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
}

/* ========== BACK TO TOP ========== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    background: var(--amber);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 4px 15px rgba(232,168,56,0.3);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--navy);
    transform: translateY(-2px);
}

/* ========== SCROLL ANIMATIONS ========== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========== MOBILE MENU ========== */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: #fff;
    z-index: 1000;
    padding: 5rem 2rem 2rem;
    box-shadow: -5px 0 30px rgba(0,0,0,0.1);
    transition: right 0.3s ease;
}

.mobile-menu.open {
    right: 0;
}

.mobile-menu a {
    display: block;
    padding: 1rem 0;
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 1.1rem;
    border-bottom: 1px solid #eee;
}

.mobile-menu a:hover {
    color: var(--amber);
}

.mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
}

.mobile-overlay.open {
    display: block;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero .subtitle {
        font-size: 1rem;
    }

    .hero-logo {
        width: 130px;
    }

    .section {
        padding: 3.5rem 0;
    }

    .section-header h2 {
        font-size: 1.7rem;
    }

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

    .contact-wrap,
    .location-wrap {
        grid-template-columns: 1fr;
    }

    .map-container {
        min-height: 300px;
    }

    .map-container iframe {
        min-height: 300px;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }

    .step-item {
        padding-bottom: 1rem;
    }
}