/* ===== DESIGN TOKENS ===== */
:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: #1a1f35;
    --bg-card-hover: #222845;
    --border: #2a3050;
    --text-primary: #e8ecf4;
    --text-secondary: #8b95b0;
    --text-muted: #5a6480;
    --accent: #6366f1;
    --accent-light: #818cf8;
    --accent-glow: rgba(99,102,241,0.25);
    --green: #10b981;
    --green-glow: rgba(16,185,129,0.2);
    --amber: #f59e0b;
    --rose: #f43f5e;
    --cyan: #06b6d4;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', system-ui, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}
a { color: var(--accent-light); text-decoration: none; transition: var(--transition); }
a:hover { color: #a5b4fc; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== NAVBAR ===== */
.navbar {
    position: sticky; top: 0; z-index: 100;
    background: rgba(10,14,26,0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
}
.nav-container {
    max-width: 1200px; margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    height: 64px;
}
.nav-brand {
    display: flex; align-items: center; gap: 10px;
    font-size: 1.25rem; font-weight: 700; color: var(--text-primary);
}
.nav-brand:hover { color: var(--text-primary); }
.brand-icon { font-size: 1.5rem; }
.brand-hl { color: var(--accent-light); }
.nav-links { display: flex; gap: 8px; }
.nav-link {
    padding: 8px 16px; border-radius: 8px;
    font-size: 0.9rem; font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}
.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
    background: var(--accent-glow);
}
.nav-link.active { color: var(--accent-light); }

/* ===== BREADCRUMB ===== */
.breadcrumb-bar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 10px 24px;
    font-size: 0.85rem;
}
.breadcrumb-bar a { color: var(--text-muted); }
.breadcrumb-bar a:hover { color: var(--accent-light); }
.breadcrumb-bar .sep { margin: 0 8px; color: var(--text-muted); }
.breadcrumb-bar .current { color: var(--text-secondary); }

/* ===== LOADING ===== */
.loading-overlay {
    position: fixed; inset: 0; z-index: 999;
    background: rgba(10,14,26,0.92);
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    gap: 20px; transition: opacity 0.5s;
}
.loading-overlay.hidden { opacity: 0; pointer-events: none; }
.loading-overlay p { color: var(--text-secondary); font-size: 1rem; }
.spinner {
    width: 48px; height: 48px;
    border: 4px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== PAGES ===== */
.page { display: none; animation: fadeUp 0.4s ease; padding-bottom: 60px; }
.page.active { display: block; }
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== HERO ===== */
.hero {
    text-align: center; padding: 48px 0 32px;
}
.hero h1 {
    font-size: 2.5rem; font-weight: 800;
    letter-spacing: -0.03em; margin-bottom: 12px;
}
.gtext {
    background: linear-gradient(135deg, var(--accent-light), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.subtitle { color: var(--text-secondary); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }
.stats-row {
    display: flex; justify-content: center; gap: 20px;
    margin-top: 28px; flex-wrap: wrap;
}
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 18px 32px;
    display: flex; flex-direction: column; align-items: center; gap: 4px;
    min-width: 120px;
    transition: var(--transition);
}
.stat-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.stat-num { font-size: 2rem; font-weight: 800; color: var(--accent-light); }
.stat-lbl { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; }

/* ===== CARDS ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

/* ===== FILTER ===== */
.filter-head {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 20px; flex-wrap: wrap; gap: 12px;
}
.filter-head h2 { font-size: 1.2rem; font-weight: 700; }
.btn-reset {
    background: transparent; border: 1px solid var(--border);
    color: var(--text-secondary); padding: 8px 18px;
    border-radius: 8px; cursor: pointer; font-size: 0.85rem;
    transition: var(--transition);
}
.btn-reset:hover { border-color: var(--rose); color: var(--rose); }
.filter-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.fg label {
    display: block; font-size: 0.8rem; font-weight: 600;
    color: var(--text-muted); text-transform: uppercase;
    letter-spacing: 0.06em; margin-bottom: 6px;
}
.fg select, .fg input {
    width: 100%; padding: 10px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.9rem; font-family: inherit;
    transition: var(--transition);
    outline: none;
}
.fg select:focus, .fg input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.fg select option { background: var(--bg-secondary); }
.badge {
    background: var(--accent-glow);
    color: var(--accent-light);
    padding: 4px 14px; border-radius: 20px;
    font-size: 0.85rem; font-weight: 600;
}

/* ===== TABLE ===== */
.table-wrap { overflow-x: auto; }
.dtable {
    width: 100%; border-collapse: collapse;
    font-size: 0.9rem;
}
.dtable thead th {
    background: var(--bg-secondary);
    color: var(--text-muted);
    font-weight: 600; font-size: 0.78rem;
    text-transform: uppercase; letter-spacing: 0.06em;
    padding: 14px 16px; text-align: left;
    border-bottom: 2px solid var(--border);
    position: sticky; top: 0;
}
.dtable tbody tr {
    border-bottom: 1px solid rgba(42,48,80,0.5);
    transition: var(--transition);
}
.dtable tbody tr:hover { background: rgba(99,102,241,0.06); }
.dtable tbody td { padding: 12px 16px; color: var(--text-secondary); }
.dtable tbody td:nth-child(3) { color: var(--text-primary); font-weight: 500; }
.link-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 14px; border-radius: 6px;
    background: var(--accent-glow);
    color: var(--accent-light);
    font-size: 0.82rem; font-weight: 500;
    transition: var(--transition);
}
.link-btn:hover { background: var(--accent); color: #fff; transform: translateY(-1px); }
.empty {
    text-align: center; padding: 48px 20px;
    color: var(--text-muted);
}
.empty span { font-size: 3rem; display: block; margin-bottom: 12px; }

/* ===== SEMESTER GRID ===== */
.semester-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px; padding-bottom: 40px;
}
.sem-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    cursor: default;
}
.sem-card:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: 0 8px 32px rgba(99,102,241,0.15); }
.sem-card-head {
    padding: 20px 24px;
    background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(6,182,212,0.08));
    border-bottom: 1px solid var(--border);
    display: flex; align-items: center; justify-content: space-between;
}
.sem-card-head h3 { font-size: 1.1rem; font-weight: 700; }
.sem-badge {
    background: var(--accent-glow);
    color: var(--accent-light);
    padding: 4px 12px; border-radius: 20px;
    font-size: 0.78rem; font-weight: 600;
}
.sem-card-body { padding: 16px 24px; }
.sem-card-body p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 14px; }
.course-list { list-style: none; }
.course-item {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 14px; margin-bottom: 6px;
    border-radius: 8px;
    background: var(--bg-secondary);
    border: 1px solid transparent;
    transition: var(--transition);
    font-size: 0.88rem;
    color: var(--text-secondary);
}
.course-item:hover { border-color: var(--accent); color: var(--text-primary); }
.course-item .sks { font-size: 0.75rem; color: var(--text-muted); white-space: nowrap; }
.course-item.clickable { cursor: pointer; }
.course-item.clickable:hover { background: var(--accent-glow); }
.course-item.clickable::after { content: '→'; color: var(--accent-light); font-weight: 700; }
.sem-desc { font-size: 0.82rem; color: var(--text-muted); font-style: italic; }

/* ===== PORTFOLIO BUTTON IN TABLE ===== */
.portfolio-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 14px; border-radius: 8px;
    background: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(6,182,212,0.1));
    border: 1px solid rgba(99,102,241,0.3);
    color: var(--accent-light);
    font-size: 0.82rem; font-weight: 500;
    cursor: pointer; font-family: inherit;
    transition: var(--transition);
    white-space: nowrap;
}
.portfolio-btn:hover {
    background: linear-gradient(135deg, var(--accent), var(--cyan));
    color: #fff; border-color: transparent;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--accent-glow);
}
.portfolio-count {
    background: var(--accent);
    color: #fff;
    font-size: 0.7rem; font-weight: 700;
    padding: 1px 7px; border-radius: 10px;
    min-width: 18px; text-align: center;
}
.dtable tbody tr.has-portfolio td:nth-child(3) {
    color: var(--accent-light);
}

/* ===== PORTFOLIO MODAL ===== */
.modal-overlay {
    position: fixed; inset: 0; z-index: 1000;
    background: rgba(10, 14, 26, 0.8);
    backdrop-filter: blur(8px);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; pointer-events: none;
    transition: opacity 0.3s ease;
    padding: 24px;
}
.modal-overlay.active {
    opacity: 1; pointer-events: auto;
}
.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    width: 100%; max-width: 680px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 24px 80px rgba(0,0,0,0.5), 0 0 60px var(--accent-glow);
    position: relative;
    transform: translateY(24px) scale(0.96);
    transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
}
.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
}
.modal-close {
    position: absolute; top: 16px; right: 16px;
    width: 36px; height: 36px;
    border-radius: 10px;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 1rem; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition);
    z-index: 2;
}
.modal-close:hover {
    background: var(--rose); color: #fff;
    border-color: var(--rose);
}
.modal-header {
    display: flex; align-items: center; gap: 18px;
    padding: 28px 28px 20px;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(6,182,212,0.04));
}
.modal-avatar {
    width: 56px; height: 56px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--accent), var(--cyan));
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; font-weight: 800;
    color: #fff; flex-shrink: 0;
}
.modal-header h2 {
    font-size: 1.2rem; font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}
.modal-subtitle {
    font-size: 0.85rem; color: var(--text-muted);
    margin-top: 2px;
}
.modal-body {
    padding: 20px 28px 28px;
}
.modal-empty {
    text-align: center; padding: 40px 20px;
    color: var(--text-muted); font-size: 1rem;
}
.modal-semester-group {
    margin-bottom: 24px;
}
.modal-semester-group:last-child { margin-bottom: 0; }
.modal-sem-header {
    display: flex; align-items: center; gap: 10px;
    margin-bottom: 14px; padding-bottom: 10px;
    border-bottom: 1px solid rgba(42,48,80,0.5);
}
.modal-sem-icon { font-size: 1.2rem; }
.modal-sem-header h3 {
    font-size: 1rem; font-weight: 700;
    color: var(--text-primary); flex: 1;
}
.modal-sem-count {
    font-size: 0.75rem; font-weight: 600;
    color: var(--cyan);
    background: rgba(6,182,212,0.12);
    padding: 3px 10px; border-radius: 12px;
}
.modal-courses {
    display: flex; flex-direction: column; gap: 8px;
}
.modal-course-card {
    display: flex; align-items: center; justify-content: space-between;
    background: var(--bg-secondary);
    border: 1px solid rgba(42,48,80,0.6);
    border-radius: 12px;
    padding: 14px 18px;
    transition: var(--transition);
    gap: 12px;
    flex-wrap: wrap;
}
.modal-course-card:hover {
    border-color: var(--accent);
    background: rgba(99,102,241,0.06);
}
.modal-course-name {
    font-size: 0.9rem; font-weight: 500;
    color: var(--text-primary);
    flex: 1; min-width: 0;
}
.modal-course-links {
    display: flex; gap: 8px; flex-shrink: 0;
}
.modal-link-btn {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 6px 14px; border-radius: 8px;
    font-size: 0.8rem; font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
}
.modal-link-uts {
    background: rgba(245,158,11,0.12);
    color: var(--amber);
    border: 1px solid rgba(245,158,11,0.25);
}
.modal-link-uts:hover {
    background: var(--amber); color: #fff;
    border-color: var(--amber);
    transform: translateY(-1px);
}
.modal-link-uas {
    background: rgba(16,185,129,0.12);
    color: var(--green);
    border: 1px solid rgba(16,185,129,0.25);
}
.modal-link-uas:hover {
    background: var(--green); color: #fff;
    border-color: var(--green);
    transform: translateY(-1px);
}
.modal-link-na {
    font-size: 0.78rem; color: var(--text-muted);
    padding: 6px 10px;
}

/* Modal scrollbar */
.modal-content::-webkit-scrollbar { width: 6px; }
.modal-content::-webkit-scrollbar-track { background: transparent; }
.modal-content::-webkit-scrollbar-thumb {
    background: var(--border); border-radius: 3px;
}
.modal-content::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ===== FOOTER ===== */
.footer {
    border-top: 1px solid var(--border);
    padding: 24px; text-align: center;
    color: var(--text-muted); font-size: 0.85rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .hero h1 { font-size: 1.8rem; }
    .nav-link { font-size: 0.8rem; padding: 6px 10px; }
    .semester-grid { grid-template-columns: 1fr; }
    .filter-grid { grid-template-columns: 1fr 1fr; }
    .card { padding: 18px; }
    .stat-card { padding: 14px 20px; }
}
@media (max-width: 480px) {
    .filter-grid { grid-template-columns: 1fr; }
    .stats-row { gap: 10px; }
    .hero h1 { font-size: 1.5rem; }
}