:root {
    --primary-color: #0a2540;
    /* Biru Gelap */
    --secondary-color: #f8f9fa;
    /* Putih Keabuan */
    --accent-color: #0d6efd;
    /* Biru Bootstrap */
}

body {
    font-family: 'Poppins', sans-serif;
    scroll-behavior: smooth;
    padding-top: 56px;
    /* Global padding top for fixed navbar */
}

section {
    padding-top: 5rem;
    padding-bottom: 5rem;
}

/* Navbar */
.navbar {
    transition: background-color 0.3s ease-in-out;
}

.navbar.scrolled {
    background-color: var(--primary-color) !important;
}

.navbar-brand {
    font-size: 1.5rem;
}

.nav-link {
    transition: color 0.2s;
}

.nav-link:hover,
.nav-link.active {
    color: #fff !important;
}

/* Page Header */
.page-header {
    background: linear-gradient(45deg, var(--primary-color), #1a3a5a);
    color: white;
    padding: 4rem 0;
    border-bottom: 4px solid var(--accent-color);
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
}

/* Hero Section */
.hero-section {
    background-color: var(--primary-color);
    color: white;
    min-height: calc(100vh - 56px);
    padding: 0;
}

.hero-section .btn-primary {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    padding: 12px 30px;
    font-weight: bold;
    transition: background-color 0.3s, transform 0.3s;
}

.hero-section .btn-primary:hover {
    background-color: #0b5ed7;
    transform: translateY(-2px);
}

/* Service Card */
.service-card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

/* Client Logo */
.client-logo {
    height: 80px;
    max-width: 200px;
    object-fit: contain;
    filter: grayscale(100%);
    transition: filter 0.3s;
}

.client-logo:hover {
    filter: grayscale(0%);
}

/* Footer */
footer a {
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}