/* --- CSS Reset & Variables --- */
:root {
    --primary-bg: #0b1120;
    --secondary-bg: #1e293b;
    --accent-color: #38bdf8;
    --accent-hover: #0284c7;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
    scroll-behavior: smooth;
}

body {
    background-color: var(--primary-bg);
    color: var(--text-main);
    line-height: 1.6;
}

/* --- Typography & Utilities --- */
h1, h2, h3 { color: var(--text-main); }
a { text-decoration: none; color: var(--text-main); }
.section-title { text-align: center; margin-bottom: 3rem; }
.section-title h2 { font-size: 2.5rem; color: var(--accent-color); margin-bottom: 0.5rem; }
.section-title p { color: var(--text-muted); }

/* --- Buttons --- */
.btn-primary {
    background: var(--accent-color);
    color: var(--primary-bg);
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
}
.btn-primary:hover {
    background: var(--text-main);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.4);
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--text-main);
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
}
.btn-secondary:hover {
    background: var(--text-main);
    color: var(--primary-bg);
}

/* --- Navbar --- */
header {
    background: rgba(11, 17, 32, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo {
    height: 40px; /* Sesuaikan ukuran logo */
    width: auto;
}

.brand-name {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

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

/* --- Hero Section --- */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 20px;
    background: radial-gradient(circle at center, #1e293b 0%, #0b1120 100%);
}

.hero-content {
    max-width: 800px;
    animation: fadeIn 1s ease-out forwards;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

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

/* --- Services & Certificates --- */
.services, .certificates {
    padding: 6rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

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

.service-card, .cert-card {
    background: var(--secondary-bg);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.service-card:hover, .cert-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.icon, .cert-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.service-card h3, .cert-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-card p, .cert-card p {
    color: var(--text-muted);
}

/* --- Footer --- */
footer {
    background: var(--secondary-bg);
    padding: 4rem 5% 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

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

.footer-contact p { color: var(--text-muted); margin-top: 0.5rem; }

.footer-bottom {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* --- Keyframes --- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav-links { display: none; } /* Bisa ditambahkan hamburger menu nanti */
    .hero h1 { font-size: 2.5rem; }
    .hero-buttons { flex-direction: column; }
}