/* Reset bawaan browser */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Font & Warna dasar */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f9f9f9;
    color: #333;
    line-height: 1.6;
}

/* Header */
header {
    background: linear-gradient(90deg, #007bff, #0056b3);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

header h1 {
    font-size: 24px;
    font-weight: bold;
}

nav a {
    color: white;
    text-decoration: none;
    margin-left: 20px;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav a:hover,
nav a.active {
    color: #ffcc00;
}

/* Hero Section */
.hero {
    background: url('https://source.unsplash.com/1600x600/?advertising,market') center/cover no-repeat;
    color: white;
    text-align: center;
    padding: 100px 20px;
}

.hero h2 {
    font-size: 40px;
    font-weight: bold;
    margin-bottom: 10px;
}

.hero p {
    font-size: 18px;
}

/* Section Umum */
.section {
    padding: 50px 20px;
    max-width: 1100px;
    margin: auto;
    text-align: center;
}

.section h2 {
    font-size: 28px;
    color: #007bff;
    margin-bottom: 20px;
}

.section p {
    font-size: 16px;
    color: #555;
}

/* Tombol CTA */
.cta-btn {
    background: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 20px;
    display: inline-block;
    text-decoration: none;
    transition: background 0.3s ease;
}

.cta-btn:hover {
    background: #0056b3;
}

/* Grid Iklan */
.iklan-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.iklan-card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.iklan-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.iklan-card h3 {
    font-size: 20px;
    margin: 15px 0 10px;
}

.iklan-card p {
    font-size: 14px;
    color: #555;
    padding: 0 15px;
}

.iklan-card .cta-btn {
    margin: 15px;
}

.iklan-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

/* Footer */
footer {
    background: #222;
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 40px;
}

/* Responsif untuk HP */
@media (max-width: 768px) {
    .hero h2 {
        font-size: 28px;
    }

    nav a {
        margin: 5px;
        display: inline-block;
    }
}