:root {
    --primary-color: #2563eb;      /* Biru utama */
    --primary-dark: #1e3a8a;       /* Biru gelap / navy */
    --primary-darker: #0f1f3d;     /* Navy sangat gelap untuk footer/navbar */
    --primary-light: #60a5fa;      /* Biru terang untuk aksen */
    --accent-cyan: #06b6d4;        /* Cyan untuk aksen ESG */
    --light-color: #f1f5fb;
    --white: #ffffff;
    --text-muted: #64748b;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Open Sans', sans-serif;
}

html { scroll-behavior: smooth; }

h1, h2, h3, h4, .nav-logo {
    font-family: 'Montserrat', sans-serif;
}

body {
    color: #333;
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

a { color: inherit; }

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: transparent;
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
    padding: 1.4rem 5%;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: background-color 0.35s ease, box-shadow 0.35s ease, padding 0.35s ease, backdrop-filter 0.35s ease;
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(15, 31, 61, 0.1);
    padding: 0.9rem 5%;
}

.logo-badge {
    display: inline-flex;
    align-items: center;
}

.logo-badge img {
    display: block;
    height: 40px;
    width: auto;
}

.logo-badge .logo-img-light {
    display: none;
}

.navbar.scrolled .logo-badge .logo-img-dark {
    display: none;
}

.navbar.scrolled .logo-badge .logo-img-light {
    display: block;
}

.footer-logo-badge {
    margin-bottom: 0.5rem;
}

.footer-logo-badge img {
    height: 46px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links {
    display: flex;
    list-style: none;
    align-items: center;
}

.nav-links li a {
    color: var(--white);
    text-decoration: none;
    padding: 0.5rem 1.1rem;
    transition: color 0.3s ease;
    font-weight: 600;
    font-size: 0.95rem;
    position: relative;
    text-shadow: 0 1px 10px rgba(15, 31, 61, 0.5);
}

.navbar.scrolled .nav-links li a {
    color: var(--primary-darker);
    text-shadow: none;
}

.nav-links li a::after {
    content: '';
    position: absolute;
    left: 1.1rem;
    right: 1.1rem;
    bottom: 0.2rem;
    height: 2px;
    background: var(--primary-light);
    transform: scaleX(0);
    transition: transform 0.3s ease;
    transform-origin: left;
}

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

.navbar.scrolled .nav-links li a:hover {
    color: var(--primary-color);
}

.nav-links li a:hover::after {
    transform: scaleX(1);
}

.nav-toggle {
    display: none;
    color: var(--white);
    font-size: 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    transition: color 0.3s ease;
}

.navbar.scrolled .nav-toggle {
    color: var(--primary-darker);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--white);
    padding: 0 1rem;
    margin-top: 0;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: -12%;
    left: 0;
    width: 100%;
    height: 124%;
    background: url('images/DSC03267-1-scaled.jpg') center/cover no-repeat;
    z-index: 0;
    will-change: transform;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(10, 18, 36, 0.55);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    animation: fadeInUp 1s ease both;
}

.hero .tag {
    display: inline-block;
    background: rgba(96, 165, 250, 0.15);
    border: 1px solid var(--primary-light);
    color: var(--primary-light);
    padding: 0.4rem 1.2rem;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.hero h1 {
    font-size: 3.2rem;
    font-weight: 800;
    margin-bottom: 1.2rem;
    text-transform: uppercase;
    line-height: 1.2;
    text-shadow: 0 2px 20px rgba(15, 31, 61, 0.5);
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 2.2rem auto;
    color: #dbeafe;
    text-shadow: 0 1px 12px rgba(15, 31, 61, 0.5);
}

.hero-btns {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 0.9rem 2.2rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: 0.3s;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
    border: 2px solid transparent;
}

.btn:hover {
    background-color: #1d4ed8;
    transform: translateY(-3px);
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.45);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--white);
    box-shadow: none;
}

.btn-outline:hover {
    background: var(--white);
    color: var(--primary-dark);
}

.scroll-down {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--white);
    font-size: 1.4rem;
    opacity: 0.8;
    animation: bounce 2s infinite;
    z-index: 2;
}

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

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

/* Stats Bar */
.stats-bar {
    background: linear-gradient(120deg, var(--primary-dark), var(--primary-color));
    padding: 3rem 4%;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2rem;
    text-align: center;
    color: var(--white);
    max-width: 1100px;
    margin: -70px auto 0 auto;
    position: relative;
    z-index: 5;
    border-radius: 24px;
    box-shadow: 0 25px 60px rgba(15, 31, 61, 0.35);
}

@media (max-width: 600px) {
    .stats-bar {
        margin-top: -40px;
        border-radius: 16px;
        gap: 1.5rem;
    }
}

.stat-item .stat-number {
    font-size: 2.6rem;
    font-weight: 800;
    font-family: 'Montserrat', sans-serif;
    color: var(--white);
}

.stat-item .stat-label {
    font-size: 0.95rem;
    color: #bfdbfe;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Section Styling */
section {
    padding: 5.5rem 5%;
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

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

.section-title .eyebrow {
    display: block;
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-size: 0.85rem;
    margin-bottom: 0.8rem;
}

.section-title h2 {
    font-size: 2.3rem;
    line-height: 1.3;
    color: var(--primary-darker);
    position: relative;
    display: block;
}

.section-title h2::after {
    content: '';
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-cyan));
    position: absolute;
    bottom: -14px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 4px;
}

.section-title p.subtitle {
    max-width: 650px;
    margin: 1.6rem auto 0 auto;
    color: var(--text-muted);
}

/* About Section */
.about-flex {
    display: flex;
    align-items: center;
    gap: 3.5rem;
    flex-wrap: wrap;
}

.about-flex .about-img {
    flex: 1 1 380px;
    min-width: 300px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(15, 31, 61, 0.2);
}

.about-flex .about-img img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

.about-flex .about-text {
    flex: 1 1 380px;
    min-width: 300px;
}

.about-text .eyebrow {
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-size: 0.85rem;
}

.about-text h2 {
    font-size: 2rem;
    color: var(--primary-darker);
    margin: 0.6rem 0 1.2rem 0;
}

.about-text p {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.about-list {
    list-style: none;
    margin-top: 1.5rem;
}

.about-list li {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 0.8rem;
    color: var(--primary-darker);
    font-weight: 600;
}

.about-list li i {
    color: var(--white);
    background: var(--primary-color);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    flex-shrink: 0;
}

/* Operasi & Layanan Grid */
.operations-section {
    background-color: var(--light-color);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.icon-circle {
    width: 60px;
    height: 60px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.2rem;
}

.icon-circle i {
    color: var(--white);
    font-size: 1.5rem;
}

/* Operations image-parallax cards */
.op-card {
    position: relative;
    height: 400px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(15, 31, 61, 0.18);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    display: flex;
    align-items: flex-end;
}

.op-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px rgba(15, 31, 61, 0.3);
}

.op-card:hover .op-card-bg {
    filter: brightness(1.05) saturate(1.1);
}

.op-card-bg {
    position: absolute;
    top: -20%;
    left: 0;
    width: 100%;
    height: 140%;
    background-size: cover;
    background-position: center;
    will-change: transform;
    transition: filter 0.4s ease;
    z-index: 0;
}

.op-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(15, 31, 61, 0.1) 0%, rgba(15, 31, 61, 0.55) 55%, rgba(15, 31, 61, 0.95) 100%);
    z-index: 1;
}

.op-card-content {
    position: relative;
    z-index: 2;
    padding: 2rem;
    color: var(--white);
}

.op-card-content .icon-circle {
    background: linear-gradient(135deg, var(--primary-light), var(--accent-cyan));
    box-shadow: 0 8px 20px rgba(6, 182, 212, 0.4);
}

.op-card-content h3 {
    color: var(--white);
    margin-bottom: 0.6rem;
    font-size: 1.3rem;
}

.op-card-content p {
    color: #dbeafe;
    font-size: 0.95rem;
}

/* ESG & K3 Section */
.esg-section {
    background: linear-gradient(180deg, var(--white), #eaf1fd);
}

.esg-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.8rem;
    max-width: 1100px;
    margin: 0 auto;
}

.esg-box {
    background: white;
    padding: 2.2rem;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(15, 31, 61, 0.08);
    border-top: 4px solid var(--accent-cyan);
    transition: 0.3s;
}

.esg-box:hover {
    transform: translateY(-6px);
}

.esg-box i.esg-icon {
    color: var(--white);
    background: linear-gradient(135deg, var(--accent-cyan), var(--primary-color));
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.2rem;
    font-size: 1.3rem;
}

.esg-box h3 {
    color: var(--primary-darker);
    margin-bottom: 0.6rem;
}

.esg-box p {
    color: var(--text-muted);
}

/* Keahlian Kami Section */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.8rem;
    max-width: 900px;
    margin: 0 auto;
}

@media (max-width: 700px) {
    .expertise-grid {
        grid-template-columns: 1fr;
    }
}

/* Mitra Section */
.partners-section {
    background-color: var(--light-color);
}

.mitra-gallery {
    position: relative;
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.mitra-track {
    display: flex;
    gap: 1.5rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    padding: 0.5rem 0.2rem 1rem 0.2rem;
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.mitra-track::-webkit-scrollbar {
    display: none;
}

.mitra-item {
    flex: 0 0 auto;
    width: 320px;
    height: 260px;
    border-radius: 18px;
    overflow: hidden;
    scroll-snap-align: start;
    box-shadow: 0 12px 30px rgba(15, 31, 61, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.mitra-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 38px rgba(15, 31, 61, 0.22);
}

.mitra-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.mitra-nav {
    flex-shrink: 0;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--white);
    border: 1px solid #e5edfb;
    color: var(--primary-darker);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: 0.3s;
    box-shadow: 0 6px 16px rgba(15, 31, 61, 0.12);
}

.mitra-nav:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

@media (max-width: 700px) {
    .mitra-item {
        width: 240px;
        height: 200px;
    }
    .mitra-nav {
        display: none;
    }
}

/* Legalitas Section */
.legal-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.2rem;
    max-width: 1000px;
    margin: 0 auto;
}

@media (max-width: 800px) {
    .legal-grid {
        grid-template-columns: 1fr;
        max-width: 460px;
    }
}

.legal-card {
    background: var(--white);
    border: 1px solid #e5edfb;
    border-radius: 18px;
    padding: 2.6rem 2.2rem;
    text-align: center;
    box-shadow: 0 6px 20px rgba(15, 31, 61, 0.07);
    transition: 0.3s;
}

.legal-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 36px rgba(15, 31, 61, 0.14);
    border-color: var(--primary-light);
}

.legal-card .legal-icon {
    width: 66px;
    height: 66px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem auto;
}

.legal-card .legal-icon i {
    color: var(--white);
    font-size: 1.6rem;
}

.legal-card h3 {
    color: var(--primary-darker);
    margin-bottom: 0.7rem;
    font-size: 1.2rem;
}

.legal-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* CTA Banner - long rounded card */
.cta-section {
    padding: 5rem 5%;
}

.cta-banner {
    max-width: 1100px;
    margin: 0 auto;
    background: linear-gradient(120deg, var(--primary-darker), var(--primary-dark) 55%, var(--primary-color));
    color: var(--white);
    border-radius: 32px;
    padding: 3.2rem 3.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2.5rem;
    flex-wrap: wrap;
    text-align: left;
    position: relative;
    overflow: hidden;
    box-shadow: 0 30px 60px rgba(15, 31, 61, 0.3);
}

.cta-banner::before {
    content: '';
    position: absolute;
    width: 320px;
    height: 320px;
    background: rgba(96, 165, 250, 0.25);
    border-radius: 50%;
    top: -140px;
    right: -80px;
    filter: blur(10px);
}

.cta-banner::after {
    content: '';
    position: absolute;
    width: 220px;
    height: 220px;
    background: rgba(6, 182, 212, 0.2);
    border-radius: 50%;
    bottom: -110px;
    left: 10%;
    filter: blur(10px);
}

.cta-banner-text {
    position: relative;
    z-index: 2;
    flex: 1 1 400px;
}

.cta-banner h2 {
    font-size: 1.9rem;
    margin-bottom: 0.8rem;
}

.cta-banner p {
    max-width: 520px;
    color: #dbeafe;
}

.cta-banner .btn {
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    white-space: nowrap;
}

@media (max-width: 700px) {
    .cta-banner {
        text-align: center;
        justify-content: center;
        padding: 2.5rem 1.8rem;
    }
    .cta-banner-text { flex: 1 1 100%; }
}

/* Kontak */
.contact-wrap {
    display: flex;
    gap: 2.5rem;
    max-width: 1100px;
    margin: 0 auto;
    align-items: stretch;
    flex-wrap: wrap;
}

.contact-info-panel {
    flex: 1 1 380px;
    background: linear-gradient(160deg, var(--primary-darker), var(--primary-dark));
    color: var(--white);
    border-radius: 20px;
    padding: 2.6rem;
    display: flex;
    flex-direction: column;
    gap: 1.7rem;
    box-shadow: 0 25px 50px rgba(15, 31, 61, 0.25);
    position: relative;
    overflow: hidden;
}

.contact-info-panel::before {
    content: '';
    position: absolute;
    width: 260px;
    height: 260px;
    background: rgba(96, 165, 250, 0.15);
    border-radius: 50%;
    top: -120px;
    right: -80px;
    filter: blur(6px);
}

.contact-info-row {
    display: flex;
    gap: 1.1rem;
    align-items: flex-start;
    position: relative;
    z-index: 1;
}

.contact-info-icon {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-info-icon i {
    color: var(--primary-light);
    font-size: 1.1rem;
}

.contact-info-row h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 0.3rem;
}

.contact-info-row p {
    color: #cbd5e1;
    font-size: 0.92rem;
    margin: 0;
}

.contact-social {
    display: flex;
    gap: 0.8rem;
    margin-top: auto;
    padding-top: 1.4rem;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    position: relative;
    z-index: 1;
}

.contact-social a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: 0.3s;
}

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

.contact-map {
    flex: 1 1 380px;
    border-radius: 20px;
    overflow: hidden;
    min-height: 380px;
    box-shadow: 0 25px 50px rgba(15, 31, 61, 0.15);
}

.contact-map iframe {
    width: 100%;
    height: 100%;
    min-height: 380px;
    border: 0;
    display: block;
    filter: grayscale(15%) contrast(1.05);
}

@media (max-width: 700px) {
    .contact-wrap {
        flex-direction: column;
    }
}

/* Footer */
footer {
    background-color: var(--primary-darker);
    color: #cbd5e1;
    padding: 3rem 5% 1.5rem 5%;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto 2rem auto;
}

.footer-grid h4 {
    color: var(--white);
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

.footer-grid p, .footer-grid a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.92rem;
    display: block;
    margin-bottom: 0.6rem;
    transition: 0.3s;
}

.footer-grid a:hover {
    color: var(--primary-light);
}

.footer-social {
    display: flex;
    gap: 0.8rem;
    margin-top: 1rem;
}

.footer-social a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

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

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 1.5rem;
    font-size: 0.85rem;
    color: #64748b;
}

/* Responsive Mobile */
@media (max-width: 900px) {
    .nav-toggle { display: block; }

    .nav-links {
        position: fixed;
        top: 64px;
        right: 0;
        background-color: rgba(15, 31, 61, 0.98);
        flex-direction: column;
        width: 220px;
        height: calc(100vh - 64px);
        align-items: flex-start;
        padding: 1.5rem;
        transform: translateX(100%);
        transition: transform 0.35s ease;
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .nav-links li {
        width: 100%;
    }

    .navbar.scrolled .nav-links li a {
        color: var(--white);
    }

    .nav-links li a {
        display: block;
        width: 100%;
        padding: 0.9rem 0.5rem;
    }
}

@media (max-width: 768px) {
    .hero h1 { font-size: 2.2rem; }
    section { padding: 4rem 5%; }
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 2px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 20px;
    padding: 3px;
    margin-left: 1rem;
    transition: 0.3s ease;
}

.navbar.scrolled .lang-toggle {
    background: rgba(15, 31, 61, 0.06);
    border-color: rgba(15, 31, 61, 0.15);
}

.lang-toggle button {
    border: none;
    background: transparent;
    color: var(--white);
    font-weight: 700;
    font-size: 0.78rem;
    letter-spacing: 0.5px;
    padding: 0.35rem 0.7rem;
    border-radius: 16px;
    cursor: pointer;
    transition: 0.25s ease;
}

.navbar.scrolled .lang-toggle button {
    color: var(--primary-darker);
}

.lang-toggle button.active {
    background: var(--primary-color);
    color: var(--white) !important;
}