/* Import Font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700;800&display=swap');

/* Variabel Desain Modern - TEMA CERAH UNIK */
:root {
    --color-background: #FFFFFF;
    --color-surface: #F9FAFB; /* Abu-abu sangat lembut untuk permukaan */
    --color-primary: #007AFF; /* Biru iOS */
    --color-primary-hover: #0056b3;
    --color-border: #E5E7EB;
    --color-text-primary: #111827;
    --color-text-secondary: #6B7280;
    --font-family: 'Inter', sans-serif;
    --border-radius: 12px;
    --container-width: 1280px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
}

/* Reset & Pengaturan Dasar */
*, *::before, *::after { box-sizing: border-box; }
body {
    background-color: var(--color-background);
    color: var(--color-text-primary);
    font-family: var(--font-family);
    margin: 0;
    line-height: 1.7;
}
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Helper Class untuk Posisi Tengah (BARU) */
.page-center-container {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 90vh;
    padding: 2rem 0;
}

/* Gaya untuk Form Input (BARU) */
.form-control {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-family: var(--font-family);
    color: var(--color-text-primary);
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    box-sizing: border-box;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form-control:focus {
    border-color: var(--color-primary);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

/* Navbar Modern & Responsif */
.main-nav {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-brand {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-text-primary);
    text-decoration: none;
}
.nav-links {
    list-style: none;
    display: flex;
    gap: 2.5rem;
    margin: 0;
    padding: 0;
}
.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}
.nav-links a:hover, .nav-links a.active {
    color: var(--color-primary);
}
.nav-toggle { display: none; }

/* Tombol Profesional */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    border: none;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s ease-in-out;
}
.btn-primary {
    background-color: var(--color-primary);
    color: #FFFFFF;
}
.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.2);
}

/* Footer */
.main-footer {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 4rem 0;
    margin-top: 6rem;
    text-align: center;
    color: var(--color-text-secondary);
}
.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}
.social-links a {
    color: var(--color-text-secondary);
    font-size: 1.5rem;
    margin: 0 0.75rem;
    transition: color 0.3s ease;
}
.social-links a:hover {
    color: var(--color-primary);
}

/* Media Queries untuk Responsivitas */
@media (max-width: 992px) {
    .nav-toggle {
        display: block;
        background: none;
        border: none;
        font-size: 1.5rem;
        cursor: pointer;
        color: var(--color-text-primary);
    }
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        text-align: center;
        padding: 1rem 0;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--color-border);
    }
    .nav-links.active { display: flex; }
    .nav-links li { padding: 1rem 0; }
}