body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
    line-height: 1.6;
    background-color: #ffffff; /* Latar belakang putih bersih */
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 0;
}

h3.section-title {
    font-size: 2.2em;
    font-weight: 700;
    color: #004080; /* white */
    margin-bottom: 40px;
    position: relative;
    padding-bottom: 10px;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50%;
    height: 3px;
    background-color: #ffc107; /* Aksen emas */
    border-radius: 2px;
}

/* HEADER & NAVIGATION */
header {
    background-color: #ffffff;
    border-bottom: 1px solid #eee;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5em;
    font-weight: 700;
    color: #004080;
}

.main-nav ul {
    list-style: none;
    display: flex;
    padding: 0;
    margin: 0;
}

.main-nav ul li a {
    text-decoration: none;
    color: #333;
    padding: 10px 15px;
    display: block;
    transition: color 0.3s, background-color 0.3s;
    border-radius: 5px;
    font-weight: 500;
}

.main-nav ul li a:hover {
    color: #004080;
    background-color: #f8f9fa;
}

/* BUTTONS */
.btn {
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    display: inline-block;
    transition: background-color 0.3s, transform 0.2s;
}

.btn-primary {
    background-color: #004080;
    color: white;
    border: 2px solid #004080;
}

.btn-primary:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: #ffc107;
    color: #004080;
    border: 2px solid #ffc107;
    margin-top: 20px;
}

.btn-secondary:hover {
    background-color: #e0a800;
    transform: translateY(-2px);
}

/* HERO SECTION */
.hero {
    background: linear-gradient(rgba(0, 64, 128, 0.7), rgba(0, 64, 128, 0.7)), url('hero-bg.jpg') no-repeat center center/cover;
    color: white;
    text-align: center;
    padding: 150px 20px;
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
/* Ganti hero-bg.jpg dengan URL gambar sekolah yang relevan */

.hero-title {
    font-size: 3.5em;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-tagline {
    font-size: 1.3em;
    font-weight: 300;
    margin-bottom: 30px;
}

/* CONTENT SECTIONS */
.content-section {
    padding: 80px 0;
    text-align: center;
}

.light-bg {
    background-color: #f8f9fa;
}

.dark-bg {
    background-color: #004080;
    color: white;
}

.dark-bg a {
    color: #ffc107;
    text-decoration: none;
}

.contact-title::after {
    background-color: white;
}

/* PROFIL GRID & CARD (ELEGANT LAYOUT) */
.profil-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    text-align: left;
    margin-top: 50px;
}

.card {
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-top: 4px solid #ffc107;
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.card h4 {
    color: #004080;
    font-size: 1.5em;
    margin-top: 0;
}

/* ACADEMIC TABS */
.tabs {
    margin-bottom: 30px;
    border-bottom: 2px solid #ddd;
    display: flex;
    justify-content: center;
}

.tab-link {
    background: none;
    border: none;
    padding: 15px 30px;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: 600;
    color: #6c757d;
    transition: color 0.3s, border-bottom 0.3s;
    border-bottom: 3px solid transparent;
}

.tab-link:hover {
    color: #004080;
}

.tab-link.active {
    color: #004080;
    border-bottom: 3px solid #004080;
}

.tab-content {
    padding: 20px;
    background-color: white;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    text-align: left;
    margin: 0 auto;
    max-width: 800px;
}

/* SLIDER GALLERY */
.slider-container {
    position: relative;
    max-width: 900px;
    margin: 40px auto;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.slide {
    display: none;
    width: 100%;
    animation: fade 0.8s;
}

.slide.active-slide {
    display: block;
}

.slide img {
    width: 100%;
    height: auto;
    display: block;
}

@keyframes fade {
    from {opacity: .4}
    to {opacity: 1}
}

.prev, .next {
    cursor: pointer;
    position: absolute;
    top: 50%;
    width: auto;
    padding: 16px;
    margin-top: -22px;
    color: white;
    font-weight: bold;
    font-size: 18px;
    transition: 0.6s ease;
    border-radius: 0 3px 3px 0;
    user-select: none;
    background-color: rgba(0, 0, 0, 0.5);
    border: none;
}

.next {
    right: 0;
    border-radius: 3px 0 0 3px;
}

.prev:hover, .next:hover {
    background-color: rgba(0, 0, 0, 0.8);
}

/* FOOTER */
footer {
    background-color: #222;
    color: #bbb;
    text-align: center;
    padding: 20px 0;
    font-size: 0.9em;
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
    .nav-content {
        flex-direction: column;
    }
    .main-nav ul {
        flex-direction: column;
        text-align: center;
        width: 100%;
    }
    .main-nav ul li a {
        padding: 8px 15px;
    }
    .hero-title {
        font-size: 2.5em;
    }
    .profil-grid {
        grid-template-columns: 1fr;
    }
    .tab-link {
        padding: 10px 15px;
    }
}