/* CSS Reset and Basic Setup */
:root {
    --primary-color: #0056b3; /* A strong, corporate blue */
    --secondary-color: #007bff; /* A lighter, vibrant blue for accents */
    --dark-color: #212529;
    --light-color: #f8f9fa;
    --text-color: #495057;
    --white-color: #ffffff;
    --font-family: 'Poppins', sans-serif;
    --section-padding: 60px 0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white-color);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3 {
    font-weight: 700;
    color: var(--dark-color);
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 40px;
}

section {
    padding: var(--section-padding);
}

/* Header */
.header {
    background: var(--white-color);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-menu ul {
    list-style: none;
    display: flex;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 600;
    transition: color 0.3s ease;
}

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

.hamburger {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('https://images.unsplash.com/photo-1517048676732-d65bc937f952?q=80&w=2070&auto=format&fit=crop') no-repeat center center/cover;
    height: 90vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--white-color);
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 15px;
    color: var(--white-color);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 600px;
}

.btn-cta {
    background: var(--secondary-color);
    color: var(--white-color);
    padding: 15px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.btn-cta:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}


/* Content Section (Tentang Kami) */
.content-section {
    background-color: var(--light-color);
}

.section-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px auto;
}

.visi-misi {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 20px;
}

.visi-misi .card {
    background: var(--white-color);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    text-align: center;
}

.visi-misi .card h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

/* Feature Section (Keunggulan) */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    text-align: center;
}

.feature-item i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.feature-item h3 {
    margin-bottom: 10px;
    font-size: 1.25rem;
}

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

.registration-section p {
    text-align: center;
    max-width: 700px;
    margin: -20px auto 40px;
}

.form-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
    background: var(--white-color);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    margin-bottom: 8px;
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-family: var(--font-family);
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 5px rgba(0, 86, 179, 0.3);
}

.btn-submit {
    width: 100%;
    padding: 15px;
    background: var(--primary-color);
    color: var(--white-color);
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-submit:hover {
    background: var(--dark-color);
}

/* Footer */
.footer {
    background-color: var(--dark-color);
    color: var(--light-color);
    padding: 50px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 30px;
}

.footer-about h3 {
    color: var(--white-color);
    margin-bottom: 15px;
}

.footer-social h3 {
    color: var(--white-color);
    margin-bottom: 15px;
}

.footer-social a {
    color: var(--light-color);
    font-size: 1.8rem;
    margin-right: 15px;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #495057;
}

/* Floating WhatsApp Icon */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: #25D366;
    color: var(--white-color);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.5rem;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.2);
    z-index: 999;
    transition: transform 0.3s;
}

.whatsapp-float:hover {
    transform: scale(1.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    h2 {
        font-size: 2rem;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .nav-menu {
        position: absolute;
        top: 72px; /* Header height */
        left: 0;
        width: 100%;
        background: var(--white-color);
        flex-direction: column;
        height: 0;
        overflow: hidden;
        transition: height 0.3s ease-in-out;
    }

    .nav-menu.active {
        height: 220px; /* Adjust based on number of items */
    }

    .nav-menu ul {
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        gap: 15px;
    }

    .hamburger {
        display: block;
    }
    
    .form-layout {
        grid-template-columns: 1fr;
        padding: 20px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-social {
        margin-top: 20px;
    }
}