/* =============================================
   BASE.CSS — Global Shared Styles (OOP Approach)
   Digunakan di semua halaman via <link>
   ============================================= */

/* ===== ROOT VARIABLES ===== */
:root {
    --primary:      #0d47ff;
    --primary-dark: #0037d6;
    --secondary:    #00c3ff;
    --accent:       #00d4ff;
    --dark:         #0b132b;
    --light:        #ffffff;
    --overlay-dark: rgba(0, 0, 0, 0.65);
    --overlay-mid:  rgba(0, 0, 0, 0.6);
    --overlay-heavy:rgba(0, 0, 0, 0.8);
    --glass-bg:     rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-blur:   blur(12px);
    --card-dark:    rgba(44, 62, 115, 0.9);
    --font-main:    'Segoe UI', Arial, sans-serif;
    --bg-image:     url('../assets/BG UNPAM.jpg');
    --transition:   all 0.3s ease;
    --radius-sm:    8px;
    --radius-md:    15px;
    --radius-lg:    20px;
    --radius-pill:  30px;
    --shadow-sm:    0 5px 15px rgba(0,0,0,0.2);
    --shadow-md:    0 10px 30px rgba(0,0,0,0.3);
    --shadow-glow:  0 0 20px rgba(0, 195, 255, 0.5);
}

/* ===== RESET ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--light);
    background: var(--bg-image) center / cover no-repeat fixed;
    min-height: 100vh;
}

/* ===== OVERLAY ===== */
.overlay {
    position: absolute;
    inset: 0;
    background: var(--overlay-dark);
    pointer-events: none;
}

.overlay--mid    { background: var(--overlay-mid); }
.overlay--heavy  { background: var(--overlay-heavy); }

/* ===== SECTIONS ===== */
section {
    position: relative;
}

/* ===== CONTAINERS ===== */
.container {
    position: relative;
    z-index: 2;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.container--narrow { max-width: 900px; }
.container--wide   { max-width: 1200px; }

/* ===== TYPOGRAPHY HELPERS ===== */
.judul {
    text-align: center;
    font-size: 42px;
    font-weight: bold;
    margin-bottom: 10px;
}

.subjudul {
    text-align: center;
    margin-bottom: 50px;
    opacity: 0.85;
    line-height: 1.7;
}

/* ===== NAVBAR ===== */
.navbar {
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    background: var(--primary);
    color: var(--light);
    overflow: visible;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: bold;
    font-size: 18px;
}

.logo img {
    width: 30px;
    height: 30px;
    object-fit: contain;
}

/* MENU */
.menu {
    display: flex;
    list-style: none;
    gap: 25px;
    margin-left: auto;
    margin-right: 30px;
}

.menu li a {
    color: var(--light);
    text-decoration: none;
    transition: var(--transition);
}

.menu li a:hover {
    color: var(--secondary);
}

.menu li.active > a {
    border-bottom: 2px solid var(--light);
    padding-bottom: 4px;
}

/* DROPDOWN */
.dropdown {
    position: relative;
}

.dropdown > a::after {
    content: " ▼";
    font-size: 11px;
}

.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--primary);
    list-style: none;
    width: 220px;
    border-radius: var(--radius-sm);
    z-index: 999;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-10px);
    transition: var(--transition);
}

.submenu.show {
    max-height: 300px;
    opacity: 1;
    transform: translateY(0);
}

.submenu li {
    padding: 12px 20px;
}

.submenu li a {
    color: var(--light);
    text-decoration: none;
    display: block;
}

.submenu li:hover {
    background: rgba(255, 255, 255, 0.12);
}

/* NAV RIGHT */
.nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-right .lang {
    font-size: 14px;
    cursor: pointer;
}

/* BUTTON LOGIN */
.btn-login {
    padding: 8px 15px;
    border-radius: 20px;
    border: none;
    background: var(--light);
    color: var(--primary);
    cursor: pointer;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
}

.btn-login:hover {
    background: var(--secondary);
    color: var(--light);
}

/* ===== CARD GLASS (Reusable) ===== */
.card-glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.card-glass:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 195, 255, 0.25);
}

/* ===== BUTTONS (Reusable) ===== */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius-pill);
    font-weight: bold;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn--primary {
    background: var(--primary);
    color: var(--light);
    box-shadow: 0 8px 20px rgba(13, 71, 255, 0.3);
}

.btn--primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(13, 71, 255, 0.4);
}

.btn--gradient {
    background: linear-gradient(45deg, var(--accent), var(--primary));
    color: var(--light);
}

.btn--gradient:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

/* ===== HERO SECTION (Reusable) ===== */
.hero-section {
    position: relative;
    background: var(--bg-image) center / cover no-repeat;
    padding: 100px 60px 80px;
    min-height: 100vh;
    color: var(--light);
}

/* ===== RESPONSIVE — MOBILE ===== */
@media (max-width: 992px) {
    .menu {
        gap: 18px;
    }
}

@media (max-width: 768px) {
    .menu {
        display: none;
    }

    .judul {
        font-size: 28px;
    }

    .subjudul {
        font-size: 15px;
    }

    .hero-section {
        padding: 80px 20px 50px;
    }
}


/* ===== NAVBAR SEARCH ===== */
.nav-search-form {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    position: relative;
    gap: 6px;
}

.nav-search-input {
    width: 0;
    opacity: 0;
    padding: 8px 0;
    border: 0;
    border-radius: 999px;
    outline: none;
    background: rgba(255, 255, 255, 0.95);
    color: var(--dark);
    font-size: 14px;
    transition: var(--transition);
    pointer-events: none;
}

.nav-search-form.active .nav-search-input,
.nav-search-input:focus {
    width: 220px;
    opacity: 1;
    padding: 8px 13px;
    pointer-events: auto;
}

.nav-search-button {
    width: 38px;
    height: 38px;
    border: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.16);
    color: var(--light);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.nav-search-button:hover {
    background: var(--secondary);
    color: var(--light);
}

@media (max-width: 768px) {
    .nav-right {
        gap: 8px;
    }

    .nav-search-form.active .nav-search-input,
    .nav-search-input:focus {
        width: 160px;
    }
}