:root {
    --bg:        #0b1120;
    --bg2:       #111827;
    --bg3:       #1a2540;
    --border:    #1e2d45;
    --accent:    #00d4ff;
    --accent2:   #7c3aed;
    --accent3:   #f59e0b;
    --text:      #e2ecff;
    --muted:     #6b82a0;
    --font:      'Sora', sans-serif;
    --mono:      'JetBrains Mono', monospace;
    --green:     #10b981;
    --coral:     #ef4444;
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Nunito', sans-serif;
    line-height: 1.75;
    overflow-x: hidden;
    font-size: 16px;
  }

  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 0;
  }

  /* ── PROGRESS BAR ── */
  .progress-bar {
    position: fixed;
    top: 0; left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    z-index: 200;
    transition: width 0.1s;
    width: 0%;
  }

  /* ── HEADER ── */
  header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11,17,32,0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
  }

  .header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.85rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
  }

  .logo {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    flex-shrink: 0;
  }

  .logo-icon {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 800;
    color: #0b1120;
    flex-shrink: 0;
    font-family: var(--font);
  }

  .logo-text {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.03em;
    line-height: 1.1;
  }

  .logo-sub {
    font-size: 0.6rem;
    color: var(--accent);
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }

  nav {
    display: flex;
    gap: 0.1rem;
    flex-wrap: wrap;
  }

  nav a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.4rem 0.7rem;
    border-radius: 8px;
    transition: all 0.2s;
    white-space: nowrap;
    font-family: var(--font);
  }

  nav a:hover { color: var(--accent); background: rgba(0,212,255,0.08); }

  .nav-pill {
    background: rgba(0,212,255,0.1);
    border: 1px solid rgba(0,212,255,0.25);
    color: var(--accent);
    font-size: 0.72rem;
    font-weight: 700;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-family: var(--font);
  }

  /* ── ARTICLE HERO ── */
  .article-hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 1.25rem 2rem;
    position: relative;
    z-index: 1;
  }

  .hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0,212,255,0.1);
    border: 1px solid rgba(0,212,255,0.25);
    color: var(--accent);
    padding: 0.35rem 0.9rem;
    border-radius: 30px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 1.2rem;
    font-family: var(--font);
  }

  .article-hero h1 {
    font-family: var(--font);
    font-size: clamp(1.8rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: 1rem;
  }

  .article-hero h1 em {
    font-style: normal;
    background: linear-gradient(120deg, var(--accent) 0%, #a78bfa 50%, var(--accent3) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .article-hero .hero-desc {
    font-size: 1rem;
    color: var(--muted);
    max-width: 640px;
    margin-bottom: 1.5rem;
    line-height: 1.75;
  }

  .article-meta {
    display: flex;
    gap: 1.2rem;
    flex-wrap: wrap;
    align-items: center;
    font-size: 0.75rem;
    color: var(--muted);
    font-family: var(--mono);
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
  }

  .article-meta .tag {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    padding: 0.18rem 0.65rem;
    border-radius: 20px;
    text-transform: uppercase;
    font-family: var(--font);
  }

  .tag-cbc  { background: rgba(0,212,255,0.15); color: var(--accent); }
  .tag-free { background: rgba(16,185,129,0.15); color: #34d399; }
  .tag-hot  { background: rgba(239,68,68,0.15); color: #f87171; }

  /* ── HERO IMAGE ── */
  .hero-image-wrap {
    width: 100%;
    border-radius: 1.2rem;
    overflow: hidden;
    border: 1px solid var(--border);
    margin-bottom: 2.5rem;
    background: linear-gradient(135deg, #0a1628, #1a2a4a);
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
  }

  .hero-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }

  .hero-image-placeholder {
    text-align: center;
    color: var(--muted);
    padding: 3rem;
  }

  .hero-image-placeholder span { font-size: 3rem; display: block; margin-bottom: 0.5rem; }

  /* ── PAGE LAYOUT ── */
  .page-layout {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem 4rem;
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 2.5rem;
    position: relative;
    z-index: 1;
  }

  @media (max-width: 860px) {
    .page-layout { grid-template-columns: 1fr; }
    .sidebar { order: -1; }
  }

  /* ── ARTICLE BODY ── */
  .article-body { min-width: 0; }

  /* ── SECTION LABEL ── */
  .section-label {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font);
  }

  .section-label::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
  }

  .article-section {
    margin-bottom: 3rem;
  }

  .article-section h2 {
    font-family: var(--font);
    font-size: 1.55rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 0.8rem;
    color: var(--text);
  }

  .article-section h3 {
    font-family: var(--font);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--accent);
    margin: 1.5rem 0 0.65rem;
    letter-spacing: -0.01em;
  }

  .article-section p {
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 0.9rem;
  }

  .article-section p strong { color: var(--text); }

  hr.divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2.5rem 0;
  }

  /* ── PATHWAY CARDS ── */
  .pathway-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.25rem 0;
  }

  .pathway-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.3rem;
    transition: all 0.25s;
  }

  .pathway-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 4px 24px rgba(0,212,255,0.08);
  }

  .pw-icon { font-size: 1.8rem; display: block; margin-bottom: 0.65rem; }

  .pathway-card h4 {
    font-family: var(--font);
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.25rem;
  }

  .pathway-card .vibe {
    font-size: 0.78rem;
    color: var(--muted);
    font-style: italic;
    margin-bottom: 0.5rem;
  }

  .pathway-card .tracks {
    font-size: 0.8rem;
    color: var(--text);
    line-height: 1.6;
  }

  /* ── SUBJECT PILLS ── */
  .subject-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin: 1rem 0;
  }

  .subject-pill {
    background: var(--bg2);
    border: 1px solid var(--border);
    color: var(--muted);
    padding: 0.35rem 0.9rem;
    border-radius: 20px;
    font-size: 0.82rem;
    font-weight: 600;
    font-family: var(--font);
  }

  .subject-pill.core {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(0,212,255,0.08);
  }

  /* ── TABLE ── */
  .table-wrap {
    width: 100%;
    overflow-x: auto;
    margin: 1.25rem 0;
    border-radius: 1rem;
    border: 1px solid var(--border);
  }

  table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }

  thead tr {
    background: rgba(0,212,255,0.07);
    border-bottom: 1px solid var(--border);
  }

  thead th {
    padding: 0.8rem 1rem;
    text-align: left;
    font-family: var(--font);
    font-weight: 700;
    font-size: 0.75rem;
    color: var(--accent);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    white-space: nowrap;
  }

  tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background 0.15s;
  }

  tbody tr:last-child { border-bottom: none; }
  tbody tr:hover { background: rgba(0,212,255,0.03); }

  tbody td {
    padding: 0.75rem 1rem;
    color: var(--muted);
    vertical-align: top;
    line-height: 1.5;
    font-size: 0.88rem;
  }

  tbody td:first-child { color: var(--text); font-weight: 600; }

  .badge {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 700;
    font-family: var(--font);
  }

  .badge-blue   { background: rgba(0,212,255,0.12); color: var(--accent); border: 1px solid rgba(0,212,255,0.3); }
  .badge-green  { background: rgba(16,185,129,0.12); color: #34d399; border: 1px solid rgba(16,185,129,0.3); }
  .badge-amber  { background: rgba(245,158,11,0.12); color: var(--accent3); border: 1px solid rgba(245,158,11,0.3); }
  .badge-coral  { background: rgba(239,68,68,0.12); color: #f87171; border: 1px solid rgba(239,68,68,0.3); }

  /* ── CALLOUT ── */
  .callout {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    border-radius: 10px;
    padding: 1rem 1.3rem;
    margin: 1.2rem 0;
    font-size: 0.9rem;
    color: var(--muted);
    line-height: 1.7;
  }

  .callout strong { color: var(--accent); }
  .callout a { color: var(--accent); }

  .callout.green { border-left-color: #10b981; }
  .callout.green strong { color: #34d399; }

  .callout.amber { border-left-color: var(--accent3); }
  .callout.amber strong { color: var(--accent3); }

  /* ── STAT GRID ── */
  .stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin: 1.25rem 0;
  }

  .stat-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.2rem;
    text-align: center;
    transition: border-color 0.2s;
  }

  .stat-card:hover { border-color: var(--accent); }
  .stat-card.highlight { border-color: var(--accent); }

  .stat-num {
    font-family: var(--font);
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
    display: block;
    line-height: 1;
    margin-bottom: 0.4rem;
  }

  .stat-label { font-size: 0.78rem; color: var(--muted); line-height: 1.45; }

  /* ── CTA BLOCK ── */
  .cta-block {
    background: linear-gradient(135deg, rgba(0,212,255,0.08) 0%, rgba(124,58,237,0.06) 100%);
    border: 1px solid rgba(0,212,255,0.22);
    border-radius: 1.2rem;
    padding: 1.6rem 1.8rem;
    text-align: center;
    margin: 1.8rem 0;
  }

  .cta-block h3 {
    font-family: var(--font);
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 0.4rem;
  }

  .cta-block p {
    color: var(--muted);
    font-size: 0.88rem;
    margin-bottom: 1.1rem;
  }

  .btn-primary {
    background: var(--accent);
    color: #0b1120;
    padding: 0.65rem 1.5rem;
    border-radius: 40px;
    font-weight: 700;
    font-size: 0.88rem;
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    font-family: var(--font);
    display: inline-block;
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,212,255,0.35);
  }

  .btn-ghost {
    background: transparent;
    color: var(--text);
    padding: 0.65rem 1.5rem;
    border-radius: 40px;
    font-weight: 600;
    font-size: 0.88rem;
    text-decoration: none;
    border: 1px solid var(--border);
    transition: all 0.2s;
    display: inline-block;
    margin-left: 0.6rem;
    font-family: var(--font);
  }

  .btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

  /* ── TEACHER TIPS ── */
  .teacher-tip {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem 1.2rem;
    margin-bottom: 0.65rem;
    transition: border-color 0.2s;
  }

  .teacher-tip:hover { border-color: var(--accent); }

  .tip-rank {
    background: rgba(0,212,255,0.1);
    border: 1px solid rgba(0,212,255,0.25);
    color: var(--accent);
    font-family: var(--font);
    font-weight: 700;
    font-size: 0.82rem;
    width: 30px; height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }

  .tip-msg {
    font-size: 0.9rem;
    color: var(--text);
    font-style: italic;
    margin-bottom: 0.2rem;
    line-height: 1.55;
  }

  .tip-action {
    font-size: 0.8rem;
    color: #34d399;
    font-weight: 700;
  }

  /* ── TIMELINE ── */
  .timeline {
    position: relative;
    padding-left: 2rem;
    margin: 1.5rem 0;
  }

  .timeline::before {
    content: '';
    position: absolute;
    left: 8px; top: 8px; bottom: 8px;
    width: 2px;
    background: linear-gradient(180deg, var(--accent) 0%, rgba(0,212,255,0.1) 100%);
    border-radius: 2px;
  }

  .tl-item {
    position: relative;
    margin-bottom: 1.4rem;
  }

  .tl-item::before {
    content: '';
    position: absolute;
    left: -1.65rem; top: 6px;
    width: 10px; height: 10px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--bg);
    box-shadow: 0 0 0 2px var(--accent);
  }

  .tl-month {
    font-family: var(--font);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.15rem;
  }

  .tl-title { font-size: 0.9rem; color: var(--text); font-weight: 600; margin-bottom: 0.15rem; }
  .tl-action { font-size: 0.82rem; color: var(--muted); }

  /* ── EMERGENCY GRID ── */
  .emergency-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
    margin: 1.25rem 0;
  }

  .emergency-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem 1.1rem;
    transition: border-color 0.2s;
  }

  .emergency-card:hover { border-color: #f87171; }

  .emergency-card .problem {
    font-size: 0.72rem;
    color: #f87171;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.35rem;
  }

  .emergency-card .contact { font-size: 0.9rem; color: var(--text); font-weight: 600; margin-bottom: 0.15rem; }
  .emergency-card .number { font-size: 0.85rem; color: var(--accent); font-weight: 600; margin-bottom: 0.15rem; font-family: var(--mono); }
  .emergency-card .timing { font-size: 0.75rem; color: var(--muted); }

  /* ── QUICK LINKS ── */
  .quick-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 0.7rem;
    margin: 1.25rem 0;
  }

  .quick-link {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.85rem 1rem;
    text-decoration: none;
    transition: all 0.2s;
    display: block;
  }

  .quick-link:hover { border-color: var(--accent); transform: translateY(-2px); }

  .ql-label { font-size: 0.7rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 0.15rem; font-family: var(--font); }
  .ql-name { font-size: 0.88rem; color: var(--accent); font-weight: 700; font-family: var(--font); }

  /* ── SUMMARY TABLE ── */
  .summary-table { margin: 1.25rem 0; }

  .summary-row {
    display: flex;
    gap: 1rem;
    padding: 0.85rem 1rem;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 0.5rem;
    align-items: flex-start;
    transition: border-color 0.2s;
  }

  .summary-row:hover { border-color: var(--accent); }

  .summary-q {
    font-weight: 700;
    color: var(--accent);
    font-size: 0.85rem;
    min-width: 190px;
    flex-shrink: 0;
    font-family: var(--font);
  }

  .summary-a { font-size: 0.87rem; color: var(--muted); line-height: 1.6; }

  /* ── CTA GRID ── */
  .cta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
  }

  .cta-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.4rem;
    text-align: center;
    transition: all 0.25s;
  }

  .cta-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 4px 24px rgba(0,212,255,0.08);
  }

  .cta-card .who { font-size: 1.8rem; margin-bottom: 0.45rem; display: block; }
  .cta-card .role { font-size: 0.78rem; color: var(--muted); margin-bottom: 0.75rem; }

  .action-btn {
    display: inline-block;
    background: rgba(0,212,255,0.1);
    border: 1px solid rgba(0,212,255,0.25);
    color: var(--accent);
    padding: 0.42rem 1rem;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s;
    font-family: var(--font);
  }

  .action-btn:hover { background: rgba(0,212,255,0.2); }

  /* ── CHECKLIST ── */
  .checklist { list-style: none; padding: 0; margin: 0.75rem 0; }

  .checklist li {
    padding: 0.42rem 0 0.42rem 1.6rem;
    position: relative;
    font-size: 0.9rem;
    color: var(--muted);
    border-bottom: 1px solid var(--border);
  }

  .checklist li:last-child { border: none; }

  .checklist li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #34d399;
    font-weight: 700;
  }

  /* ── DISCLOSURE ── */
  .disclosure {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.1rem 1.4rem;
    font-size: 0.8rem;
    color: var(--muted);
    line-height: 1.7;
    margin: 2rem 0;
  }

  .disclosure strong { color: var(--text); }

  /* ── SIDEBAR ── */
  .sidebar {
    position: sticky;
    top: 76px;
    align-self: start;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
  }

  @media (max-width: 860px) { .sidebar { position: static; } }

  .sidebar-widget {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.2rem;
  }

  .widget-title {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.85rem;
    padding-bottom: 0.55rem;
    border-bottom: 1px solid var(--border);
    font-family: var(--font);
  }

  /* ── SEARCH BAR ── */
  .search-bar { display: flex; gap: 0.45rem; }

  .search-bar input {
    flex: 1;
    background: var(--bg3);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.6rem 0.85rem;
    border-radius: 9px;
    font-family: 'Nunito', sans-serif;
    font-size: 0.85rem;
    transition: border-color 0.2s;
    min-width: 0;
  }

  .search-bar input:focus { outline: none; border-color: var(--accent); }

  .search-bar button {
    background: var(--accent);
    color: #0b1120;
    border: none;
    padding: 0.6rem 1rem;
    border-radius: 9px;
    font-weight: 700;
    font-family: var(--font);
    font-size: 0.82rem;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
  }

  .search-bar button:hover { box-shadow: 0 4px 16px rgba(0,212,255,0.3); }

  /* ── SIDEBAR LINKS ── */
  .sidebar-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
    transition: all 0.15s;
  }

  .sidebar-link:last-child { border: none; }

  .sidebar-link:hover .sl-title { color: var(--accent); }

  .sl-title {
    font-size: 0.83rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.3;
    flex: 1;
  }

  .sl-arrow { color: var(--muted); font-size: 0.75rem; margin-left: 0.5rem; }

  /* ── NEWSLETTER WIDGET ── */
  .nl-input {
    width: 100%;
    background: var(--bg3);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.6rem 0.85rem;
    border-radius: 9px;
    font-family: 'Nunito', sans-serif;
    font-size: 0.85rem;
    margin-bottom: 0.6rem;
    transition: border-color 0.2s;
  }

  .nl-input:focus { outline: none; border-color: var(--accent); }

  .nl-btn {
    width: 100%;
    background: var(--accent);
    color: #0b1120;
    border: none;
    padding: 0.65rem;
    border-radius: 9px;
    font-weight: 700;
    font-family: var(--font);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
  }

  .nl-btn:hover { box-shadow: 0 4px 16px rgba(0,212,255,0.3); }

  .nl-desc { font-size: 0.78rem; color: var(--muted); margin-bottom: 0.8rem; line-height: 1.5; }

  /* ── CATEGORY PILLS ── */
  .cat-list { display: flex; flex-wrap: wrap; gap: 0.4rem; }

  .cat-pill {
    background: var(--bg3);
    border: 1px solid var(--border);
    color: var(--muted);
    padding: 0.28rem 0.7rem;
    border-radius: 20px;
    font-size: 0.74rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font);
    text-decoration: none;
  }

  .cat-pill.active, .cat-pill:hover {
    background: rgba(0,212,255,0.1);
    border-color: var(--accent);
    color: var(--accent);
  }

  /* ── SCROLL ANIMATIONS ── */
  .fade-up {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.48s ease, transform 0.48s ease;
  }

  .fade-up.visible { opacity: 1; transform: translateY(0); }

  /* ── FOOTER ── */
  footer {
    background: var(--bg2);
    border-top: 1px solid var(--border);
    padding: 2rem 1.25rem;
    text-align: center;
    position: relative;
    z-index: 1;
  }

  .footer-logo {
    font-family: var(--font);
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 0.4rem;
    letter-spacing: -0.02em;
  }

  footer p { color: var(--muted); font-size: 0.8rem; margin-bottom: 0.25rem; }

  .footer-links {
    display: flex;
    gap: 1.2rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 0.8rem;
  }

  .footer-links a { color: var(--muted); font-size: 0.8rem; text-decoration: none; }
  .footer-links a:hover { color: var(--accent); }

  /* ── INLINE IMAGE ── */
  .article-img {
    width: 100%;
    border-radius: 1rem;
    display: block;
    border: 1px solid var(--border);
    margin: 1.5rem 0;
  }

  @media (max-width: 600px) {
    .summary-row { flex-direction: column; gap: 0.3rem; }
    .summary-q { min-width: unset; }
    .btn-ghost { margin-left: 0; margin-top: 0.5rem; }
  }
/* ── SCIENCE BLOG ADVERTISEMENT ── */
.science-ad {
  max-width: 100%;
  margin: 2rem auto;
  position: relative;
  z-index: 1;
  width: 100%;
}

.science-ad-inner {
  background: linear-gradient(135deg, #0b1120 0%, #111827 50%, #0f172a 100%);
  border: 1px solid var(--border);
  border-radius: 1.4rem;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  transition: all 0.3s ease;
  width: 100%;
  box-sizing: border-box;
}

.science-ad-icon {
  font-size: 2.5rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  width: 65px;
  height: 65px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #0b1120;
}

.science-ad-content {
  flex: 1;
  min-width: 200px;
}

.science-ad-badge {
  display: inline-block;
  background: rgba(0, 212, 255, 0.15);
  border: 1px solid rgba(0, 212, 255, 0.25);
  color: var(--accent);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.2rem 0.7rem;
  border-radius: 30px;
  margin-bottom: 0.6rem;
  text-transform: uppercase;
  font-family: var(--font);
}

.science-ad-content h3 {
  font-family: var(--font);
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  color: var(--text);
  line-height: 1.3;
}

.science-ad-content h3 span {
  background: linear-gradient(120deg, var(--accent) 0%, #a78bfa 50%, var(--accent3) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.science-ad-content p {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.55;
  margin-bottom: 0.9rem;
}

.science-ad-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.science-ad-features span {
  font-size: 0.68rem;
  color: var(--text);
  background: rgba(0, 212, 255, 0.06);
  padding: 0.2rem 0.7rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  font-family: var(--font);
}

.science-ad-buttons {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.science-ad-btn-primary {
  background: var(--accent);
  color: #0b1120;
  padding: 0.5rem 1.2rem;
  border-radius: 40px;
  font-weight: 700;
  font-size: 0.78rem;
  text-decoration: none;
  display: inline-block;
  font-family: var(--font);
}

.science-ad-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 212, 255, 0.35);
}

.science-ad-btn-secondary {
  background: transparent;
  color: var(--text);
  padding: 0.5rem 1.2rem;
  border-radius: 40px;
  font-weight: 600;
  font-size: 0.78rem;
  text-decoration: none;
  border: 1px solid var(--border);
  display: inline-block;
  font-family: var(--font);
}

.science-ad-btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Mobile Responsive */
@media (max-width: 600px) {
  .science-ad-inner {
    flex-direction: column;
    text-align: center;
  }
  .science-ad-features {
    justify-content: center;
  }
  .science-ad-buttons {
    justify-content: center;
    flex-direction: column;
    width: 100%;
  }
  .science-ad-btn-primary,
  .science-ad-btn-secondary {
    width: 100%;
    text-align: center;
  }
}