/* ============================================
   CBT Application - Custom Styles
   Dark Theme with Glassmorphism
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: rgba(30, 30, 60, 0.7);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --border-glass: rgba(255, 255, 255, 0.1);
    --text-primary: #e8e8f0;
    --text-secondary: #a0a0b8;
    --text-muted: #6c6c80;
    --accent-primary: #6c63ff;
    --accent-secondary: #4ecdc4;
    --accent-gradient: linear-gradient(135deg, #6c63ff, #4ecdc4);
    --danger: #ff6b6b;
    --warning: #ffd93d;
    --success: #51cf66;
    --info: #339af0;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated Background */
.bg-animated {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1; overflow: hidden;
}
.bg-animated::before, .bg-animated::after {
    content: ''; position: absolute; border-radius: 50%;
    animation: float 15s infinite ease-in-out;
}
.bg-animated::before {
    width: 400px; height: 400px; top: -100px; right: -100px;
    background: radial-gradient(circle, rgba(108,99,255,0.15), transparent 70%);
}
.bg-animated::after {
    width: 500px; height: 500px; bottom: -150px; left: -150px;
    background: radial-gradient(circle, rgba(78,205,196,0.1), transparent 70%);
    animation-delay: -7s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* Glass Card */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.glass-card:hover { border-color: rgba(108,99,255,0.3); }

/* Login Page */
.login-container {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    padding: 1rem;
}
.login-card {
    width: 100%; max-width: 420px; padding: 2.5rem;
}
.login-logo {
    text-align: center; margin-bottom: 2rem;
}
.login-logo h1 {
    font-size: 1.8rem; font-weight: 800;
    background: var(--accent-gradient); -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; background-clip: text;
}
.login-logo p { color: var(--text-secondary); font-size: 0.9rem; margin-top: 0.5rem; }

/* Forms */
.form-group { margin-bottom: 1.2rem; }
.form-group label {
    display: block; margin-bottom: 0.4rem; font-size: 0.85rem;
    font-weight: 500; color: var(--text-secondary);
}
.form-control, .form-select {
    width: 100%; padding: 0.75rem 1rem; border-radius: var(--radius-sm);
    border: 1px solid var(--border-glass); background: var(--bg-glass);
    color: var(--text-primary); font-family: 'Inter', sans-serif;
    font-size: 0.95rem; transition: var(--transition);
}
.form-control:focus, .form-select:focus {
    outline: none; border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(108,99,255,0.2);
}
.form-control::placeholder { color: var(--text-muted); }
textarea.form-control { min-height: 100px; resize: vertical; }

/* Buttons */
.btn-primary-custom {
    width: 100%; padding: 0.8rem; border: none; border-radius: var(--radius-sm);
    background: var(--accent-gradient); color: #fff; font-weight: 600;
    font-size: 1rem; cursor: pointer; transition: var(--transition);
    font-family: 'Inter', sans-serif;
}
.btn-primary-custom:hover { transform: translateY(-2px); box-shadow: 0 5px 20px rgba(108,99,255,0.4); }
.btn-primary-custom:active { transform: translateY(0); }

.btn-glass {
    padding: 0.6rem 1.2rem; border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm); background: var(--bg-glass);
    color: var(--text-primary); cursor: pointer; transition: var(--transition);
    font-family: 'Inter', sans-serif; font-size: 0.85rem; text-decoration: none;
    display: inline-flex; align-items: center; gap: 0.4rem;
}
.btn-glass:hover { background: rgba(255,255,255,0.1); border-color: var(--accent-primary); color: #fff; }

.btn-sm { padding: 0.4rem 0.8rem; font-size: 0.8rem; }
.btn-danger { background: rgba(255,107,107,0.2); border-color: var(--danger); color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-success { background: rgba(81,207,102,0.2); border-color: var(--success); color: var(--success); }
.btn-success:hover { background: var(--success); color: #fff; }
.btn-warning { background: rgba(255,217,61,0.2); border-color: var(--warning); color: var(--warning); }
.btn-warning:hover { background: var(--warning); color: #1a1a2e; }
.btn-info { background: rgba(51,154,240,0.2); border-color: var(--info); color: var(--info); }
.btn-info:hover { background: var(--info); color: #fff; }

/* Navbar */
.navbar-custom {
    background: rgba(15, 15, 26, 0.9); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass); padding: 0.8rem 1.5rem;
    position: sticky; top: 0; z-index: 1000;
    display: flex; align-items: center; justify-content: space-between;
}
.navbar-brand {
    font-weight: 700; font-size: 1.2rem; text-decoration: none;
    background: var(--accent-gradient); -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; background-clip: text;
}
.navbar-user { display: flex; align-items: center; gap: 1rem; }
.navbar-user span { font-size: 0.85rem; color: var(--text-secondary); }
.navbar-user .role-badge {
    padding: 0.2rem 0.6rem; border-radius: 20px; font-size: 0.7rem;
    font-weight: 600; text-transform: uppercase;
}
.role-admin { background: rgba(108,99,255,0.2); color: var(--accent-primary); }
.role-mahasiswa { background: rgba(78,205,196,0.2); color: var(--accent-secondary); }

/* Hamburger */
.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.hamburger span {
    display: block; width: 24px; height: 2px; margin: 5px 0;
    background: var(--text-primary); transition: var(--transition);
}

/* Sidebar */
.sidebar {
    width: 250px; background: var(--bg-secondary); border-right: 1px solid var(--border-glass);
    min-height: calc(100vh - 60px); padding: 1.5rem 0; position: fixed;
    top: 60px; left: 0; z-index: 999; transition: var(--transition);
}
.sidebar-menu { list-style: none; }
.sidebar-menu a {
    display: flex; align-items: center; gap: 0.8rem;
    padding: 0.8rem 1.5rem; color: var(--text-secondary);
    text-decoration: none; transition: var(--transition); font-size: 0.9rem;
}
.sidebar-menu a:hover, .sidebar-menu a.active {
    color: var(--text-primary); background: var(--bg-glass);
    border-right: 3px solid var(--accent-primary);
}
.sidebar-menu a.active { color: var(--accent-primary); }

/* Main Content */
.main-content { margin-left: 250px; padding: 1.5rem; min-height: calc(100vh - 60px); }
.page-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 1.5rem; flex-wrap: wrap; gap: 1rem;
}
.page-header h2 {
    font-size: 1.5rem; font-weight: 700;
    background: var(--accent-gradient); -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; background-clip: text;
}

/* Stats Cards */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card {
    padding: 1.2rem; border-radius: var(--radius); text-align: center;
}
.stat-card .stat-value {
    font-size: 2rem; font-weight: 800; line-height: 1;
    background: var(--accent-gradient); -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; background-clip: text;
}
.stat-card .stat-label { font-size: 0.8rem; color: var(--text-secondary); margin-top: 0.4rem; }

/* Tables */
.table-container { overflow-x: auto; border-radius: var(--radius); }
table {
    width: 100%; border-collapse: collapse; font-size: 0.85rem;
}
thead { background: rgba(108,99,255,0.1); }
th {
    padding: 0.8rem 1rem; text-align: left; font-weight: 600;
    color: var(--accent-primary); border-bottom: 1px solid var(--border-glass);
    white-space: nowrap;
}
td {
    padding: 0.7rem 1rem; border-bottom: 1px solid var(--border-glass);
    color: var(--text-secondary);
}
tr:hover td { background: var(--bg-glass); }

/* Status Badges */
.badge {
    padding: 0.25rem 0.7rem; border-radius: 20px; font-size: 0.75rem;
    font-weight: 600; display: inline-block;
}
.badge-success { background: rgba(81,207,102,0.15); color: var(--success); }
.badge-warning { background: rgba(255,217,61,0.15); color: var(--warning); }
.badge-danger { background: rgba(255,107,107,0.15); color: var(--danger); }
.badge-info { background: rgba(51,154,240,0.15); color: var(--info); }
.badge-secondary { background: rgba(160,160,184,0.15); color: var(--text-secondary); }

/* Alert Messages */
.alert {
    padding: 0.8rem 1.2rem; border-radius: var(--radius-sm); margin-bottom: 1rem;
    font-size: 0.9rem; animation: slideDown 0.3s ease;
}
.alert-success { background: rgba(81,207,102,0.1); border: 1px solid rgba(81,207,102,0.3); color: var(--success); }
.alert-danger { background: rgba(255,107,107,0.1); border: 1px solid rgba(255,107,107,0.3); color: var(--danger); }
.alert-warning { background: rgba(255,217,61,0.1); border: 1px solid rgba(255,217,61,0.3); color: var(--warning); }
.alert-info { background: rgba(51,154,240,0.1); border: 1px solid rgba(51,154,240,0.3); color: var(--info); }

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Exam Interface */
.exam-container { max-width: 900px; margin: 0 auto; padding: 1rem; }
.exam-header {
    position: sticky; top: 0; z-index: 100; padding: 1rem;
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 1rem;
}
.timer {
    font-size: 1.5rem; font-weight: 800; font-variant-numeric: tabular-nums;
    padding: 0.5rem 1.2rem; border-radius: var(--radius-sm);
    background: rgba(81,207,102,0.1); border: 1px solid rgba(81,207,102,0.3);
    color: var(--success);
}
.timer.warning { background: rgba(255,217,61,0.1); border-color: rgba(255,217,61,0.3); color: var(--warning); }
.timer.danger {
    background: rgba(255,107,107,0.1); border-color: rgba(255,107,107,0.3);
    color: var(--danger); animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* Question Card */
.question-card { padding: 1.5rem; margin-bottom: 1rem; }
.question-number {
    font-size: 0.8rem; font-weight: 600; color: var(--accent-primary);
    text-transform: uppercase; letter-spacing: 1px; margin-bottom: 0.5rem;
}
.question-text { font-size: 1rem; line-height: 1.6; margin-bottom: 1.2rem; }
.option-list { list-style: none; }
.option-item {
    padding: 0.8rem 1rem; margin-bottom: 0.5rem; border-radius: var(--radius-sm);
    border: 1px solid var(--border-glass); cursor: pointer;
    transition: var(--transition); display: flex; align-items: flex-start; gap: 0.8rem;
}
.option-item:hover { border-color: var(--accent-primary); background: rgba(108,99,255,0.05); }
.option-item.selected { border-color: var(--accent-primary); background: rgba(108,99,255,0.15); }
.option-label {
    width: 28px; height: 28px; border-radius: 50%; display: flex;
    align-items: center; justify-content: center; font-weight: 700;
    font-size: 0.8rem; flex-shrink: 0;
    background: var(--bg-glass); border: 1px solid var(--border-glass);
}
.option-item.selected .option-label {
    background: var(--accent-primary); color: #fff; border-color: var(--accent-primary);
}
.option-text { padding-top: 0.2rem; }

/* Question Navigation */
.question-nav {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(42px, 1fr)); gap: 0.4rem;
    padding: 1rem;
}
.q-nav-btn {
    width: 42px; height: 42px; border-radius: var(--radius-sm); border: 1px solid var(--border-glass);
    background: var(--bg-glass); color: var(--text-secondary); font-weight: 600;
    font-size: 0.85rem; cursor: pointer; transition: var(--transition);
    display: flex; align-items: center; justify-content: center;
}
.q-nav-btn:hover { border-color: var(--accent-primary); }
.q-nav-btn.current { background: var(--accent-primary); color: #fff; border-color: var(--accent-primary); }
.q-nav-btn.answered { background: rgba(81,207,102,0.2); color: var(--success); border-color: rgba(81,207,102,0.3); }
.q-nav-btn.marked { background: rgba(255,217,61,0.2); color: var(--warning); border-color: rgba(255,217,61,0.3); }

/* Token Input */
.token-input {
    text-align: center; font-size: 2rem; letter-spacing: 0.5rem;
    text-transform: uppercase; font-weight: 700;
}

/* Score Display */
.score-display {
    text-align: center; padding: 2rem;
}
.score-value {
    font-size: 5rem; font-weight: 800; line-height: 1;
    background: var(--accent-gradient); -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; background-clip: text;
    animation: scoreReveal 1s ease;
}

@keyframes scoreReveal {
    from { opacity: 0; transform: scale(0.5); }
    to { opacity: 1; transform: scale(1); }
}

/* Violation Warning Overlay */
.violation-overlay {
    display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(255,107,107,0.95); z-index: 10000;
    justify-content: center; align-items: center; text-align: center;
    flex-direction: column; color: #fff;
}
.violation-overlay.show { display: flex; }
.violation-overlay h2 { font-size: 2rem; margin-bottom: 1rem; }
.violation-overlay p { font-size: 1.1rem; max-width: 400px; }

/* Modal */
.modal-overlay {
    display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.7); z-index: 9999;
    justify-content: center; align-items: center; padding: 1rem;
}
.modal-overlay.show { display: flex; }
.modal-content {
    width: 100%; max-width: 500px; padding: 2rem;
    animation: slideDown 0.3s ease;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent-primary); border-radius: 3px; }

/* Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; } .mb-2 { margin-bottom: 1rem; } .mb-3 { margin-bottom: 1.5rem; }
.d-flex { display: flex; } .gap-1 { gap: 0.5rem; } .gap-2 { gap: 1rem; }
.flex-wrap { flex-wrap: wrap; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.w-100 { width: 100%; }

/* Student layout (no sidebar) */
.student-content { max-width: 800px; margin: 0 auto; padding: 1.5rem; }

/* Mobile Exam Nav */
.mobile-nav-btn { display: none; }
.nav-overlay {
    display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5); z-index: 9999; backdrop-filter: blur(2px);
    transition: opacity 0.2s ease;
    opacity: 0; pointer-events: none;
}
.nav-overlay.show { display: block; opacity: 1; pointer-events: all; }

/* Responsive */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .hamburger { display: block; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .page-header { flex-direction: column; align-items: flex-start; }
    .timer { font-size: 1.2rem; }
    .score-value { font-size: 3.5rem; }
    .navbar-user span.user-name { display: none; }
    
    /* Exam Mobile Nav */
    .mobile-nav-btn { display: inline-flex; }
    #navPanel {
        position: fixed !important;
        top: 0;
        right: -300px;
        width: 260px !important;
        height: 100vh;
        background: var(--bg-primary);
        z-index: 10000;
        transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: -5px 0 25px rgba(0,0,0,0.5);
    }
    #navPanel.show { right: 0; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .login-card { padding: 1.5rem; }
    .login-logo h1 { font-size: 1.4rem; }
}

/* ============================================
   Light / Dark Theme Toggle
   ============================================ */
[data-theme="light"] {
    --bg-primary: #f0f2f8;
    --bg-secondary: #e4e7f2;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-glass: rgba(0, 0, 0, 0.04);
    --border-glass: rgba(108, 99, 255, 0.18);
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-muted: #8080a0;
    --shadow: 0 8px 32px rgba(108, 99, 255, 0.12);
}
[data-theme="light"] body {
    background: linear-gradient(135deg, #f0f2f8 0%, #e8ebf8 100%);
}
[data-theme="light"] .navbar-custom {
    background: rgba(255, 255, 255, 0.92);
    border-bottom-color: rgba(108, 99, 255, 0.2);
}
[data-theme="light"] .sidebar {
    background: rgba(255, 255, 255, 0.95);
    border-right-color: rgba(108, 99, 255, 0.15);
}
[data-theme="light"] .sidebar-menu a:hover,
[data-theme="light"] .sidebar-menu a.active {
    background: rgba(108, 99, 255, 0.08);
}
[data-theme="light"] .form-control,
[data-theme="light"] .form-select {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(108, 99, 255, 0.2);
    color: var(--text-primary);
}
[data-theme="light"] thead { background: rgba(108, 99, 255, 0.07); }
[data-theme="light"] tr:hover td { background: rgba(108, 99, 255, 0.04); }
[data-theme="light"] .bg-animated::before {
    background: radial-gradient(circle, rgba(108, 99, 255, 0.07), transparent 70%);
}
[data-theme="light"] .bg-animated::after {
    background: radial-gradient(circle, rgba(78, 205, 196, 0.05), transparent 70%);
}
[data-theme="light"] .glass-card {
    background: rgba(255, 255, 255, 0.82);
    border-color: rgba(108, 99, 255, 0.15);
}
[data-theme="light"] .glass-card:hover { border-color: rgba(108, 99, 255, 0.35); }
[data-theme="light"] ::-webkit-scrollbar-track { background: #e8ebf8; }

/* Smooth theme transition */
html, body, .navbar-custom, .sidebar, .glass-card,
.form-control, .form-select, .btn-glass {
    transition: background 0.3s ease, color 0.3s ease,
                border-color 0.3s ease, box-shadow 0.3s ease;
}
/* Toggle button icon spin */
#themeIcon { transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1); }