/* ==========================================================================
   KelasCTF.fun - Cyberpunk & Modern Responsive Design System
   Support: Dark Mode & Light Mode, Mobile, Tablet, Laptop, & Desktop
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Theme Variables
   -------------------------------------------------------------------------- */
:root, [data-theme="dark"] {
    --bg-body: #060913;
    --bg-card: rgba(13, 19, 36, 0.75);
    --bg-card-hover: rgba(20, 30, 56, 0.85);
    --bg-header: rgba(8, 12, 24, 0.82);
    --bg-input: rgba(10, 15, 30, 0.85);
    --bg-modal: #0d1324;
    --border-cyber: rgba(0, 255, 136, 0.3);
    --border-cyan: rgba(0, 240, 255, 0.3);
    --border-subtle: rgba(255, 255, 255, 0.09);
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    --neon-green: #00ff88;
    --neon-cyan: #00f0ff;
    --neon-blue: #3b82f6;
    --neon-pink: #ff2a85;
    --btn-primary-bg: linear-gradient(135deg, #00ff88, #00d2ff);
    --btn-primary-text: #04120a;
    --glow-green: 0 0 20px rgba(0, 255, 136, 0.25);
    --glow-cyan: 0 0 20px rgba(0, 240, 255, 0.25);
    --glow-card: 0 12px 35px rgba(0, 0, 0, 0.6);
    --table-stripe-even: rgba(15, 23, 42, 0.6);
    --table-stripe-odd: rgba(10, 16, 31, 0.4);
    --code-bg: rgba(6, 11, 25, 0.9);
}

[data-theme="light"] {
    --bg-body: #f1f5f9;
    --bg-card: rgba(255, 255, 255, 0.88);
    --bg-card-hover: rgba(255, 255, 255, 0.98);
    --bg-header: rgba(255, 255, 255, 0.88);
    --bg-input: rgba(248, 250, 252, 0.95);
    --bg-modal: #ffffff;
    --border-cyber: rgba(16, 185, 129, 0.4);
    --border-cyan: rgba(2, 132, 199, 0.4);
    --border-subtle: rgba(15, 23, 42, 0.1);
    --text-main: #0f172a;
    --text-muted: #475569;
    --text-dim: #64748b;
    --neon-green: #059669;
    --neon-cyan: #0284c7;
    --neon-blue: #2563eb;
    --neon-pink: #db2777;
    --btn-primary-bg: linear-gradient(135deg, #10b981, #0284c7);
    --btn-primary-text: #ffffff;
    --glow-green: 0 4px 18px rgba(16, 185, 129, 0.25);
    --glow-cyan: 0 4px 18px rgba(2, 132, 199, 0.25);
    --glow-card: 0 10px 30px rgba(15, 23, 42, 0.08);
    --table-stripe-even: rgba(241, 245, 249, 0.8);
    --table-stripe-odd: rgba(255, 255, 255, 0.9);
    --code-bg: rgba(241, 245, 249, 0.95);
}

/* --------------------------------------------------------------------------
   2. Reset & Core Base
   -------------------------------------------------------------------------- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

html, body {
    height: 100%;
    width: 100%;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    overflow-x: hidden;
    line-height: 1.5;
    scroll-behavior: smooth;
}

#particles-js {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 1.25rem 1.5rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography Helpers */
h1, h2, h3, h4, .cyber-font {
    font-family: 'Orbitron', system-ui, sans-serif;
    letter-spacing: 0.03em;
    color: var(--text-main);
}

code, pre, .code-font {
    font-family: 'Fira Code', monospace;
}

/* --------------------------------------------------------------------------
   3. Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.25rem;
    background: var(--bg-header);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-subtle);
    border-radius: 1rem;
    box-shadow: var(--glow-card);
    margin-bottom: 1.75rem;
    gap: 1rem;
    position: sticky;
    top: 1rem;
    z-index: 100;
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    font-family: 'Orbitron', sans-serif;
    font-weight: 800;
    font-size: 1.35rem;
    color: var(--text-main);
}

.logo-icon {
    font-size: 1.4rem;
    color: var(--neon-green);
    filter: drop-shadow(0 0 8px var(--neon-green));
}

.logo-text {
    letter-spacing: 0.05em;
}

.logo-accent {
    color: var(--neon-green);
}

/* Header Action Buttons (Theme Toggle & Mobile Menu) */
.header-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.icon-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    color: var(--text-main);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.1rem;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.icon-btn:hover {
    border-color: var(--neon-green);
    color: var(--neon-green);
    transform: translateY(-2px);
    box-shadow: var(--glow-green);
}

.mobile-only {
    display: none;
}

/* Nav Links */
.nav-links {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.nav-links a {
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    border: 1px solid transparent;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    transition: all 0.2s ease;
}

.nav-icon {
    font-size: 0.85rem;
    opacity: 0.85;
}

.nav-links a:hover {
    color: var(--text-main);
    border-color: var(--border-cyber);
    background: var(--bg-card);
    transform: translateY(-1px);
}

.nav-links a.primary {
    background: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    font-weight: 600;
    border: none;
    box-shadow: var(--glow-green);
}

.nav-links a.primary:hover {
    opacity: 0.92;
    transform: translateY(-2px);
}

.nav-links a.danger {
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.3);
}

.nav-links a.danger:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: #ef4444;
}

.nav-links a.admin-link {
    color: var(--neon-cyan);
    border-color: var(--border-cyan);
}

.nav-links a.admin-link:hover {
    box-shadow: var(--glow-cyan);
}

/* --------------------------------------------------------------------------
   4. Main Content Area
   -------------------------------------------------------------------------- */
.content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* --------------------------------------------------------------------------
   5. Hero Section (Home)
   -------------------------------------------------------------------------- */
.hero {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 2rem;
    align-items: center;
    margin-top: 1rem;
}

.hero.hero-home {
    min-height: calc(100vh - 220px);
}

.hero-text h1 {
    font-size: clamp(2.1rem, 4.5vw, 3rem);
    line-height: 1.25;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-main) 40%, var(--neon-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text p {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: 1.75rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
}

.hero-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 1.25rem;
    padding: 1.75rem;
    border: 1px solid var(--border-cyber);
    box-shadow: var(--glow-card), var(--glow-green);
    position: relative;
    overflow: hidden;
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    will-change: transform;
}

.hero-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--btn-primary-bg);
}

.hero-card h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--neon-green);
}

.hero-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    margin-bottom: 1.25rem;
}

.hero-card li {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-size: 0.95rem;
    color: var(--text-main);
}

.hero-card li i {
    color: var(--neon-green);
    font-size: 0.85rem;
}

.hint {
    font-size: 0.85rem;
    color: var(--neon-cyan);
    background: rgba(2, 132, 199, 0.1);
    padding: 0.6rem 0.85rem;
    border-radius: 0.5rem;
    border: 1px dashed var(--border-cyan);
    display: inline-block;
}

code {
    font-family: 'Fira Code', monospace;
    background: var(--code-bg);
    padding: 0.2rem 0.45rem;
    border-radius: 0.35rem;
    font-size: 0.85rem;
    border: 1px solid var(--border-subtle);
    color: var(--neon-green);
}

/* --------------------------------------------------------------------------
   6. Buttons & Interactive Controls
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.35rem;
    border-radius: 999px;
    border: 1px solid transparent;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    background: var(--bg-card);
    color: var(--text-main);
    border-color: var(--border-subtle);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-card);
    border-color: var(--border-cyber);
}

.btn.primary, .btn-primary {
    background: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    border: none;
    box-shadow: var(--glow-green);
}

.btn.primary:hover, .btn-primary:hover {
    opacity: 0.92;
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(0, 255, 136, 0.4);
}

.btn.outline {
    background: transparent;
    border: 1px solid var(--neon-green);
    color: var(--neon-green);
}

.btn.outline:hover {
    background: rgba(0, 255, 136, 0.1);
    box-shadow: var(--glow-green);
}

.btn.ghost {
    background: var(--bg-card);
    color: var(--text-muted);
    border-color: var(--border-subtle);
}

.btn.ghost:hover {
    color: var(--text-main);
    border-color: var(--border-cyber);
}

.btn.full {
    width: 100%;
}

.btn.small {
    padding: 0.4rem 0.85rem;
    font-size: 0.85rem;
}

.danger-btn {
    background: rgba(239, 68, 68, 0.9);
    color: #ffffff;
    border-color: #ef4444;
}

.danger-btn:hover {
    background: #dc2626;
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
}

/* --------------------------------------------------------------------------
   7. Forms & Auth Cards
   -------------------------------------------------------------------------- */
.auth-card {
    width: 100%;
    max-width: 480px;
    margin: 2rem auto;
    padding: 2.25rem;
    border-radius: 1.25rem;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-cyber);
    box-shadow: var(--glow-card), var(--glow-green);
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.auth-card h1 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--neon-green);
}

.form {
    display: flex;
    flex-direction: column;
    gap: 1.15rem;
    margin-bottom: 1rem;
}

.form label {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
}

.form input, .form textarea, .form select {
    padding: 0.85rem 1rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-subtle);
    background: var(--bg-input);
    color: var(--text-main);
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s ease;
}

.form input:focus, .form textarea:focus, .form select:focus {
    border-color: var(--neon-green);
    box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.15);
}

.alert {
    padding: 0.85rem 1.1rem;
    border-radius: 0.75rem;
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #fca5a5;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.alert-success {
    background: rgba(0, 255, 136, 0.12);
    border: 1px solid var(--border-cyber);
    color: var(--neon-green);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #fca5a5;
}

/* --------------------------------------------------------------------------
   8. Dashboard & Progress
   -------------------------------------------------------------------------- */
.dashboard {
    margin-top: 1rem;
}

.dashboard-header h1 {
    font-size: 1.8rem;
    margin-bottom: 0.4rem;
}

.dashboard-header p {
    color: var(--text-muted);
    font-size: 1rem;
}

.progress-card {
    margin: 1.5rem 0;
    padding: 1.5rem;
    border-radius: 1.15rem;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-cyber);
    box-shadow: var(--glow-card);
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.progress-card h2 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

.progress-bar {
    width: 100%;
    height: 0.75rem;
    border-radius: 999px;
    background: var(--bg-input);
    overflow: hidden;
    margin-bottom: 0.6rem;
    border: 1px solid var(--border-subtle);
}

.progress-fill {
    height: 100%;
    background: var(--btn-primary-bg);
    border-radius: inherit;
    box-shadow: var(--glow-green);
    transition: width 0.4s ease-out;
}

/* Level Grid */
.level-grid {
    margin-top: 1.25rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
}

.level-card {
    text-decoration: none;
    border-radius: 1.1rem;
    border: 1px solid var(--border-subtle);
    padding: 1.25rem;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    transition: all 0.25s ease;
    position: relative;
    overflow: hidden;
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.level-card:hover {
    border-color: var(--neon-green);
    transform: translateY(-4px) translateZ(0);
    box-shadow: var(--glow-card), var(--glow-green);
}

.level-card.completed {
    border-color: var(--border-cyber);
}

.level-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.level-badge {
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    background: rgba(0, 240, 255, 0.12);
    color: var(--neon-cyan);
    border: 1px solid var(--border-cyan);
}

.level-card h3 {
    font-size: 1.1rem;
    color: var(--text-main);
}

.level-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.status {
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.status.completed {
    background: rgba(0, 255, 136, 0.12);
    color: var(--neon-green);
    border: 1px solid var(--border-cyber);
}

.status.locked {
    background: rgba(148, 163, 184, 0.12);
    color: var(--text-muted);
    border: 1px solid var(--border-subtle);
}

/* --------------------------------------------------------------------------
   9. Level Challenge Pages & Note Wrappers
   -------------------------------------------------------------------------- */
.level {
    margin-top: 1rem;
}

.level-header h1 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
}

.level-body {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.note-wrap {
    margin-top: 1rem;
    border-radius: 1.15rem;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-cyber);
    box-shadow: var(--glow-card);
    position: relative;
    overflow: hidden;
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.note-wrap::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(800px 180px at 10% 0%, rgba(0, 255, 136, 0.12), transparent 60%),
                radial-gradient(600px 180px at 90% 0%, rgba(0, 240, 255, 0.1), transparent 60%);
    pointer-events: none;
}

.note {
    position: relative;
    padding: 1.35rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.note h2, .note h3, .note h4 {
    margin-top: 0.5rem;
    color: var(--text-main);
}

.note .muted {
    color: var(--text-muted);
}

.note ul.list, .note ol.list {
    margin-left: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    color: var(--text-main);
}

.note a {
    color: var(--neon-cyan);
    text-decoration: none;
}

.note a:hover {
    text-decoration: underline;
}

.note blockquote {
    margin: 0.75rem 0;
    padding: 0.75rem 1rem;
    border-left: 4px solid var(--neon-cyan);
    background: var(--bg-input);
    border-radius: 0.5rem;
    color: var(--text-main);
    font-style: italic;
}

.note pre {
    background: var(--code-bg);
    border: 1px solid var(--border-subtle);
    padding: 0.85rem 1rem;
    border-radius: 0.75rem;
    overflow-x: auto;
    color: var(--neon-green);
}

/* Details & Readmore */
details.readmore {
    margin-top: 1rem;
    border-top: 1px dashed var(--border-subtle);
    padding-top: 1rem;
}

details.readmore > summary {
    cursor: pointer;
    list-style: none;
    user-select: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.85rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-cyber);
    background: var(--bg-input);
    color: var(--neon-green);
    transition: all 0.2s ease;
}

details.readmore > summary::-webkit-details-marker {
    display: none;
}

details.readmore > summary::after {
    content: "▾";
    opacity: 0.9;
}

details.readmore[open] > summary::after {
    content: "▴";
}

details.readmore > summary:hover {
    box-shadow: var(--glow-green);
    transform: translateY(-1px);
}

/* Flag Forms & Alerts */
.flag-form {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    margin-top: 0.5rem;
}

.flag-form label {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

.flag-form input[type="text"] {
    padding: 0.85rem 1rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-subtle);
    background: var(--bg-input);
    color: var(--text-main);
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s ease;
    width: 100%;
}

.flag-form input[type="text"]:focus {
    border-color: var(--neon-green);
    box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.15);
}

.flag-form button {
    align-self: flex-start;
    padding: 0.75rem 1.5rem;
    border-radius: 999px;
    border: none;
    background: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--glow-green);
    transition: all 0.2s ease;
}

.flag-form button:hover {
    opacity: 0.92;
    transform: translateY(-2px);
}

.level-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1rem;
}

.hint.success {
    color: var(--neon-green);
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid var(--border-cyber);
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    margin-top: 1rem;
}

hr {
    border: none;
    border-top: 1px solid var(--border-subtle);
    margin: 1.25rem 0;
}

/* --------------------------------------------------------------------------
   10. Leaderboard & Tables
   -------------------------------------------------------------------------- */
.leaderboard {
    margin-top: 1rem;
}

.leaderboard h1 {
    font-size: 1.75rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1.25rem;
}

.leaderboard h1 i {
    color: #facc15;
}

.table-wrapper {
    border-radius: 1.1rem;
    border: 1px solid var(--border-subtle);
    overflow-x: auto;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    box-shadow: var(--glow-card);
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
    text-align: left;
}

thead {
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border-subtle);
}

th, td {
    padding: 0.9rem 1.1rem;
}

th {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--neon-cyan);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

tbody tr:nth-child(even) {
    background: var(--table-stripe-even);
}

tbody tr:nth-child(odd) {
    background: var(--table-stripe-odd);
}

tbody tr:hover {
    background: rgba(0, 255, 136, 0.05);
}

/* --------------------------------------------------------------------------
   11. Admin Dashboard & Stats
   -------------------------------------------------------------------------- */
.admin-grid {
    margin-top: 1.25rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
}

.stat-card {
    padding: 1.35rem;
    border-radius: 1.1rem;
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    box-shadow: var(--glow-card);
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.stat-card h2 {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

.stat-number {
    font-family: 'Orbitron', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--neon-green);
    text-shadow: 0 0 12px rgba(0, 255, 136, 0.3);
}

.admin-links {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
}

/* --------------------------------------------------------------------------
   12. Footer & Skripsi Note
   -------------------------------------------------------------------------- */
.site-footer {
    margin-top: 3.5rem;
    padding: 1.75rem 1.25rem 1.25rem;
    border-top: 1px solid var(--border-subtle);
    font-size: 0.85rem;
    color: var(--text-dim);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
}

.footer-skripsi-note {
    max-width: 860px;
    width: 100%;
    background: var(--bg-card);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-cyber);
    border-radius: 1.15rem;
    padding: 1.35rem 1.6rem;
    box-shadow: var(--glow-card);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.65rem;
    text-align: center;
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.skripsi-badge {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.85rem;
    border-radius: 999px;
    background: rgba(0, 255, 136, 0.12);
    color: var(--neon-green);
    border: 1px solid var(--border-cyber);
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
}

.skripsi-title {
    font-size: 0.92rem;
    color: var(--text-main);
    line-height: 1.45;
}

.skripsi-author {
    font-size: 0.88rem;
    color: var(--neon-cyan);
}

.skripsi-lecturers {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.4rem 0.85rem;
    font-size: 0.85rem;
    color: var(--text-main);
    background: var(--bg-input);
    padding: 0.55rem 1rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-subtle);
    margin: 0.2rem 0;
}

.skripsi-lecturers strong {
    color: var(--neon-green);
}

.skripsi-lecturers .divider {
    color: var(--text-dim);
    font-size: 0.8rem;
}

.skripsi-thanks {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.5;
    font-style: italic;
}

.copyright {
    font-size: 0.82rem;
    color: var(--text-dim);
}

.muted {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-top: 0.6rem;
}

.muted a {
    color: var(--neon-green);
    text-decoration: none;
}

.muted a:hover {
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   14. Manual Book Section Styles
   -------------------------------------------------------------------------- */
.manual-book-section {
    margin-top: 3.5rem;
    padding-top: 2rem;
    border-top: 1px dashed var(--border-subtle);
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.manual-header {
    text-align: center;
    max-width: 750px;
    margin: 0 auto;
}

.manual-header h2 {
    font-size: 1.85rem;
    margin-bottom: 0.6rem;
    color: var(--neon-green);
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
}

.manual-header p {
    color: var(--text-muted);
    font-size: 1rem;
}

.manual-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.manual-card {
    background: var(--bg-card);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-subtle);
    border-radius: 1.25rem;
    padding: 1.75rem;
    box-shadow: var(--glow-card);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    transition: all 0.25s ease;
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.manual-card:hover {
    border-color: var(--border-cyber);
}

.manual-card.full-width {
    grid-column: span 2;
}

.manual-card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-bottom: 0.85rem;
    border-bottom: 1px solid var(--border-subtle);
}

.card-icon {
    font-size: 1.35rem;
    color: var(--neon-green);
}

.admin-icon {
    color: var(--neon-cyan);
}

.manual-card-header h3 {
    font-size: 1.2rem;
    color: var(--text-main);
}

/* Steps */
.manual-steps {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.step-num {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--btn-primary-text);
    background: var(--btn-primary-bg);
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--glow-green);
}

.step-content h4 {
    font-size: 0.98rem;
    margin-bottom: 0.25rem;
    color: var(--text-main);
}

.step-content p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.45;
}

.step-content a {
    color: var(--neon-cyan);
    text-decoration: none;
}

/* Level details in manual */
.manual-levels {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.level-detail-item {
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    border-radius: 0.75rem;
    padding: 0.75rem 1rem;
    transition: border-color 0.2s ease;
}

.level-detail-item[open] {
    border-color: var(--border-cyber);
}

.level-detail-item summary {
    cursor: pointer;
    font-size: 0.92rem;
    color: var(--text-main);
    user-select: none;
}

.level-detail-item summary strong {
    color: var(--neon-green);
}

.level-detail-item p {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.45;
}

/* Admin manual grid */
.admin-manual-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
}

.admin-manual-item {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    background: var(--bg-input);
    padding: 1rem;
    border-radius: 0.85rem;
    border: 1px solid var(--border-subtle);
}

.admin-manual-item i {
    font-size: 1.35rem;
    color: var(--neon-cyan);
    margin-top: 0.2rem;
}

.admin-manual-item h4 {
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.admin-manual-item p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   13. Responsive Breakpoints (Mobile, Tablet, Desktop)
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
    .hero {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .hero.hero-home {
        min-height: auto;
        padding-top: 1rem;
    }

    .manual-grid {
        grid-template-columns: 1fr;
    }

    .manual-card.full-width {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .site-header {
        position: relative;
        top: 0;
        margin-bottom: 1.25rem;
        padding: 0.75rem 1rem;
    }

    .mobile-only {
        display: inline-flex;
    }

    /* Mobile Navigation Drawer */
    .nav-links {
        display: none;
        position: absolute;
        top: calc(100% + 0.5rem);
        left: 0;
        right: 0;
        background: var(--bg-header);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid var(--border-subtle);
        border-radius: 1rem;
        padding: 1rem;
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
        box-shadow: var(--glow-card);
        z-index: 200;
    }

    .nav-links.active {
        display: flex;
        animation: fadeInDown 0.25s ease-out forwards;
    }

    .nav-links a {
        justify-content: flex-start;
        padding: 0.75rem 1rem;
        border-radius: 0.75rem;
        width: 100%;
    }

    .auth-card {
        padding: 1.5rem;
        margin: 1rem auto;
    }

    .level-grid {
        grid-template-columns: 1fr;
    }

    .hero-text h1 {
        font-size: 2rem;
    }

    .stat-number {
        font-size: 1.6rem;
    }

    .skripsi-lecturers {
        flex-direction: column;
        gap: 0.3rem;
    }

    .skripsi-lecturers .divider {
        display: none;
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}