/* ════════════════════════════════════════════════════════════════════════════
   LATTICE — courses.css
   Stylesheet for the Curriculum / Courses catalog page.
   Built on the Liquid Glass design system. See assets/css/tokens.css.
   ════════════════════════════════════════════════════════════════════════════ */

/* ──────────────────────────────────────────────────────────────────
   TOKENS — Color, type, layout, and Liquid Glass tokens
   ────────────────────────────────────────────────────────────────── */
:root {
    --bg: #0a0908;
    --bg-soft: #12100e;
    --bg-card: #161310;
    --ink: #f5f1eb;
    --ink-soft: #a8a29a;
    --ink-mute: #9b9489;
    --line: rgba(245, 241, 235, 0.08);
    --line-strong: rgba(245, 241, 235, 0.18);
    --accent: #c4f542;
    --accent-deep: #9bc62a;
    --accent-glow: rgba(196, 245, 66, 0.35);
    --warn: #ff7849;
    --serif: 'Fraunces', 'Times New Roman', serif;
    --sans: 'Geist', ui-sans-serif, system-ui, -apple-system, sans-serif;
    --mono: 'JetBrains Mono', ui-monospace, monospace;
    --maxw: 1320px;
    --gutter: clamp(1.25rem, 3vw, 2.5rem);

    /* ====== Liquid Glass tokens ====== */
    --lg-radius-sm: 10px;
    --lg-radius: 18px;
    --lg-radius-lg: 26px;
    --lg-radius-pill: 999px;
    --lg-bg: rgba(20, 17, 15, 0.42);
    --lg-bg-light: rgba(245, 241, 235, 0.05);
    --lg-bg-strong: rgba(20, 17, 15, 0.62);
    --lg-border: rgba(245, 241, 235, 0.14);
    --lg-border-strong: rgba(245, 241, 235, 0.24);
    --lg-blur: blur(20px) saturate(180%);
    --lg-blur-lg: blur(28px) saturate(200%);
    --lg-shadow: inset 0 1px 0 rgba(245, 241, 235, 0.10), inset 0 -1px 0 rgba(0, 0, 0, 0.20), 0 8px 32px rgba(0, 0, 0, 0.40);
    --lg-shadow-lg: inset 0 1px 0 rgba(245, 241, 235, 0.12), inset 0 -1px 0 rgba(0, 0, 0, 0.25), 0 18px 50px rgba(0, 0, 0, 0.50);
    --lg-accent-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25), inset 0 -1px 0 rgba(0, 0, 0, 0.15), 0 6px 22px rgba(196, 245, 66, 0.28);
    --lg-accent-shadow-hover: inset 0 1px 0 rgba(255, 255, 255, 0.30), inset 0 -1px 0 rgba(0, 0, 0, 0.15), 0 14px 44px rgba(196, 245, 66, 0.45);
  }

/* ──────────────────────────────────────────────────────────────────
   RESET — Universal box-sizing / margin / padding
   ────────────────────────────────────────────────────────────────── */
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }

  body {
    background: var(--bg);
    color: var(--ink);
    font-family: var(--sans);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.55;
    overflow-x: hidden;
    cursor: none;
  }

  body::before {
    content: ""; position: fixed; inset: 0;
    pointer-events: none; z-index: 100;
    opacity: 0.06; mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml;utf8,<svg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.55 0'/></filter><rect width='200' height='200' filter='url(%23n)'/></svg>");
  }

/* ──────────────────────────────────────────────────────────────────
   SELECTION — Lime selection over warm-black
   ────────────────────────────────────────────────────────────────── */
  ::selection { background: var(--accent); color: var(--bg); }
  a { color: inherit; text-decoration: none; }
  button { font: inherit; color: inherit; background: none; border: none; cursor: none; }
  .cursor-dot, .cursor-ring {
    position: fixed; pointer-events: none; z-index: 9999;
    top: 0; left: 0;
    transform: translate(-50%, -50%);
    transition: opacity 0.2s;
  }
  .cursor-dot { width: 4px; height: 4px; background: var(--accent); border-radius: 50%; }
  .cursor-ring {
    width: 32px; height: 32px;
    border: 1px solid rgba(245, 241, 235, 0.4);
    border-radius: 50%;
    transition: width 0.25s, height 0.25s, border-color 0.25s, background 0.25s;
  }
  .cursor-ring.hover {
    width: 56px; height: 56px;
    border-color: var(--accent);
    background: rgba(196, 245, 66, 0.06);
  }

  /* NAV — floating liquid glass pill */

/* ──────────────────────────────────────────────────────────────────
   NAVIGATION — Floating Liquid Glass pill nav
   ────────────────────────────────────────────────────────────────── */
  .nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 50;
    display: flex; justify-content: center;
    padding: 1rem var(--gutter);
    pointer-events: none;
  }
  .nav-pill {
    pointer-events: auto;
    display: flex; align-items: center; justify-content: space-between;
    gap: 1.5rem;
    width: 100%; max-width: 1100px;
    padding: 0.55rem 0.7rem 0.55rem 1.4rem;
    background: var(--lg-bg);
    backdrop-filter: var(--lg-blur);
    -webkit-backdrop-filter: var(--lg-blur);
    border: 1px solid var(--lg-border);
    border-radius: var(--lg-radius-pill);
    box-shadow: var(--lg-shadow);
    transition: padding 0.35s cubic-bezier(.2,.7,.2,1), background 0.3s, border-color 0.3s, box-shadow 0.3s, transform 0.4s;
  }
  .nav.scrolled .nav-pill {
    padding-top: 0.45rem; padding-bottom: 0.45rem;
    background: var(--lg-bg-strong);
    border-color: var(--lg-border-strong);
    box-shadow: var(--lg-shadow-lg);
    transform: translateY(-2px);
  }
  .nav-brand {
    display: flex; align-items: center; gap: 0.6rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    font-size: 0.82rem;
    text-transform: uppercase;
  }
  .nav-mark {
    width: 22px; height: 22px;
    position: relative;
  }
  .nav-mark::before, .nav-mark::after {
    content: ""; position: absolute; inset: 0;
    border: 1.5px solid var(--ink);
    transition: transform 0.7s cubic-bezier(.2,.7,.2,1), border-color 0.3s;
  }
  .nav-mark::after { transform: rotate(45deg) scale(0.7); border-color: var(--accent); }
  .nav-brand:hover .nav-mark::before { transform: rotate(45deg); }
  .nav-brand:hover .nav-mark::after { transform: rotate(0deg) scale(1); }
  .nav-links {
    display: flex; gap: 2.5rem;
    font-size: 0.85rem;
    color: var(--ink-soft);
  }
  .nav-link {
    position: relative;
    padding: 0.4rem 0;
    transition: color 0.3s;
  }
  .nav-link.active { color: var(--ink); }
  .nav-link::after {
    content: ""; position: absolute;
    bottom: 0; left: 0;
    height: 1px; width: 100%;
    background: var(--accent);
    transform: scaleX(0); transform-origin: left;
    transition: transform 0.45s cubic-bezier(.2,.7,.2,1);
  }
  .nav-link.active::after { transform: scaleX(1); }
  .nav-link:hover { color: var(--ink); }
  .nav-link:hover::after { transform: scaleX(1); }
  .nav-cta {
    display: inline-flex; align-items: center; gap: 0.6rem;
    padding: 0.6rem 1.05rem;
    background: var(--accent);
    color: var(--bg);
    font-weight: 500;
    font-size: 0.82rem;
    letter-spacing: 0.04em;
    border: 1px solid rgba(196, 245, 66, 0.5);
    border-radius: 999px;
    box-shadow: var(--lg-accent-shadow);
    transition: transform 0.3s, box-shadow 0.4s;
  }
  .nav-cta:hover { transform: translateY(-1px); box-shadow: var(--lg-accent-shadow-hover); }
  .nav-cta-arrow { display: inline-block; transition: transform 0.4s cubic-bezier(.2,.7,.2,1); }
  .nav-cta:hover .nav-cta-arrow { transform: translateX(4px); }
  @media (max-width: 720px) {
    .nav-links { display: none; }
  }
/* ──────────────────────────────────────────────────────────────────
   HERO — 3D canvas slot, veil, headline, eyebrow, sub
   ────────────────────────────────────────────────────────────────── */
  .hero {
    position: relative;
    min-height: 92vh;
    padding: clamp(7rem, 12vh, 10rem) var(--gutter) 5rem;
    display: flex; flex-direction: column; justify-content: center;
    overflow: hidden;
  }
  #lattice-canvas {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
  }
  .hero-veil {
    position: absolute; inset: 0; z-index: 1;
    background:
      radial-gradient(ellipse at 30% 50%, rgba(10,9,8,0.4) 0%, rgba(10,9,8,0) 55%),
      linear-gradient(180deg, rgba(10,9,8,0.2) 0%, rgba(10,9,8,0) 30%, rgba(10,9,8,0.6) 100%);
    pointer-events: none;
  }
  .hero-inner {
    position: relative; z-index: 2;
    max-width: var(--maxw);
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 3rem;
    align-items: end;
  }
  @media (max-width: 920px) {
    .hero-inner { grid-template-columns: 1fr; }
  }
  .hero-eyebrow {
    display: inline-flex; align-items: center; gap: 0.75rem;
    padding: 0.55rem 0.95rem 0.55rem 0.85rem;
    background: var(--lg-bg);
    backdrop-filter: var(--lg-blur);
    -webkit-backdrop-filter: var(--lg-blur);
    border: 1px solid var(--lg-border);
    border-radius: var(--lg-radius-pill);
    box-shadow: var(--lg-shadow);
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--ink-soft);
    margin-bottom: 1.8rem;
    width: fit-content;
    opacity: 0; animation: fadeUp 0.9s 0.2s cubic-bezier(.2,.7,.2,1) forwards;
  }
  .hero-eyebrow .dot {
    width: 6px; height: 6px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 14px var(--accent-glow);
    animation: pulse 2.4s ease-in-out infinite;
  }
  .hero-headline {
    font-family: var(--serif);
    font-weight: 300;
    font-size: clamp(2.8rem, 8vw, 7.4rem);
    line-height: 0.96;
    letter-spacing: -0.03em;
    max-width: 14ch;
    color: var(--ink);
  }
  .hero-headline .word {
    display: inline-block;
    opacity: 0;
    transform: translateY(40px);
    animation: fadeUp 1s cubic-bezier(.2,.7,.2,1) forwards;
  }
  .hero-headline .word:nth-child(1) { animation-delay: 0.30s; }
  .hero-headline .word:nth-child(2) { animation-delay: 0.40s; }
  .hero-headline .word:nth-child(3) { animation-delay: 0.50s; }
  .hero-headline .word:nth-child(4) { animation-delay: 0.60s; }
  .hero-headline .word:nth-child(5) { animation-delay: 0.70s; }
  .hero-headline em {
    font-style: italic;
    font-weight: 300;
    color: var(--accent);
  }
  .hero-sub {
    margin-top: 2rem;
    max-width: 50ch;
    color: var(--ink-soft);
    font-size: clamp(1rem, 1.2vw, 1.1rem);
    line-height: 1.55;
    font-weight: 300;
    opacity: 0; animation: fadeUp 1s 1s cubic-bezier(.2,.7,.2,1) forwards;
  }

/* ──────────────────────────────────────────────────────────────────
   HERO STATS — Glass stats tile with serif numerals
   ────────────────────────────────────────────────────────────────── */
  .hero-stats {
    display: grid;
    grid-template-columns: repeat(2, auto);
    gap: 0.6rem;
    align-self: end;
    padding: 1.4rem;
    background: var(--lg-bg);
    backdrop-filter: var(--lg-blur);
    -webkit-backdrop-filter: var(--lg-blur);
    border: 1px solid var(--lg-border);
    border-radius: var(--lg-radius-lg);
    box-shadow: var(--lg-shadow);
    opacity: 0; animation: fadeUp 1.2s 1.2s cubic-bezier(.2,.7,.2,1) forwards;
  }
  .hero-stats div { min-width: 110px; padding: 0.6rem 1rem; }
  .hero-stats .num {
    font-family: var(--serif);
    font-weight: 300;
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    line-height: 1;
    letter-spacing: -0.02em;
  }
  .hero-stats .num em { font-style: italic; color: var(--accent); }
  .hero-stats .lab {
    font-family: var(--mono);
    font-size: 0.66rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-mute);
    margin-top: 0.4rem;
  }

/* ──────────────────────────────────────────────────────────────────
   HERO META — Mono editorial signature line at the bottom
   ────────────────────────────────────────────────────────────────── */
  .hero-meta {
    position: absolute;
    left: var(--gutter); right: var(--gutter); bottom: 1.6rem;
    z-index: 2;
    display: flex; justify-content: space-between;
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-mute);
    opacity: 0; animation: fadeUp 1.2s 1.5s cubic-bezier(.2,.7,.2,1) forwards;
  }

/* ──────────────────────────────────────────────────────────────────
   KEYFRAMES — Animation definitions
   ────────────────────────────────────────────────────────────────── */
  @keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.85); }
  }
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  /* FILTER BAR — liquid glass */

/* ──────────────────────────────────────────────────────────────────
   FILTER BAR — Sticky Liquid Glass pill bar
   ────────────────────────────────────────────────────────────────── */
  .filter-bar {
    position: sticky;
    top: 5.2rem;
    z-index: 30;
    margin: 1rem var(--gutter) 0;
    padding: 0.75rem 1rem;
    background: var(--lg-bg-strong);
    backdrop-filter: var(--lg-blur);
    -webkit-backdrop-filter: var(--lg-blur);
    border: 1px solid var(--lg-border);
    border-radius: var(--lg-radius-pill);
    box-shadow: var(--lg-shadow);
    max-width: calc(var(--maxw) - 2rem);
    margin-left: auto; margin-right: auto;
  }
  .filter-inner {
    max-width: var(--maxw);
    margin: 0 auto;
    display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 1.2rem;
  }
  .filter-label {
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--ink-mute);
  }
  .filter-label::before { content: "§ "; color: var(--accent); }

/* ──────────────────────────────────────────────────────────────────
   FILTER CHIPS — Mono pill filter buttons
   ────────────────────────────────────────────────────────────────── */
  .filter {
    font-family: var(--mono);
    font-size: 0.74rem;
    letter-spacing: 0.06em;
    color: var(--ink-soft);
    padding: 0.45rem 0.95rem;
    background: var(--lg-bg-light);
    border: 1px solid var(--lg-border);
    border-radius: 999px;
    box-shadow: inset 0 1px 0 rgba(245, 241, 235, 0.05);
    transition: color 0.3s, border-color 0.3s, background 0.3s, box-shadow 0.3s;
    cursor: none;
  }
  .filter:hover {
    color: var(--ink);
    border-color: var(--lg-border-strong);
    background: var(--lg-bg);
  }
  .filter.active {
    color: var(--bg);
    background: var(--accent);
    border-color: rgba(196, 245, 66, 0.55);
    box-shadow: var(--lg-accent-shadow);
  }
  .filter-divider {
    width: 1px; height: 18px;
    background: var(--line-strong);
    display: inline-block;
  }
  .filter-count {
    margin-left: auto;
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-mute);
  }
  .filter-count strong { color: var(--accent); font-weight: 500; }

  /* COURSES GRID */
  .courses-section {
    padding: clamp(4rem, 8vh, 6rem) 0 clamp(5rem, 10vh, 8rem);
    position: relative;
    background: var(--bg);
    z-index: 2;
  }
  .courses-grid {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 var(--gutter);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.2rem;
  }
  @media (max-width: 820px) {
    .courses-grid { grid-template-columns: 1fr; }
  }

  .course {
    background: var(--lg-bg-light);
    backdrop-filter: var(--lg-blur);
    -webkit-backdrop-filter: var(--lg-blur);
    border: 1px solid var(--lg-border);
    border-radius: var(--lg-radius-lg);
    box-shadow: var(--lg-shadow);
    padding: clamp(1.8rem, 3vw, 2.6rem);
    position: relative;
    transition: background 0.5s, transform 0.5s cubic-bezier(.2,.7,.2,1), opacity 0.5s, border-color 0.4s, box-shadow 0.5s;
    display: flex; flex-direction: column;
    overflow: hidden;
    cursor: none;
  }
  .course:hover {
    transform: translateY(-4px);
    border-color: rgba(196, 245, 66, 0.35);
    background: rgba(196, 245, 66, 0.04);
    box-shadow: var(--lg-shadow-lg);
  }
  .course.hidden {
    display: none;
  }
  .course::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 80% 20%, rgba(196, 245, 66, 0.06), transparent 55%);
    opacity: 0;
    transition: opacity 0.6s;
    pointer-events: none;
  }
  .course:hover::before { opacity: 1; }

  /* corner brackets on hover */
  .course-corner {
    position: absolute;
    width: 12px; height: 12px;
    border: 1px solid var(--accent);
    opacity: 0;
    transition: opacity 0.5s, transform 0.6s cubic-bezier(.2,.7,.2,1);
    pointer-events: none;
  }
  .course-corner.tl { top: 14px; left: 14px; border-right: none; border-bottom: none; }
  .course-corner.br { bottom: 14px; right: 14px; border-left: none; border-top: none; }
  .course:hover .course-corner { opacity: 1; }
  .course:hover .course-corner.tl { transform: translate(-3px, -3px); }
  .course:hover .course-corner.br { transform: translate(3px, 3px); }

  .course-top {
    display: flex; justify-content: space-between; align-items: flex-start;
    margin-bottom: 1.4rem;
  }
  .course-num {
    font-family: var(--serif);
    font-style: italic;
    font-weight: 300;
    font-size: clamp(2.4rem, 4vw, 3.6rem);
    line-height: 1;
    letter-spacing: -0.04em;
    color: var(--ink);
    transition: color 0.5s;
  }
  .course:hover .course-num { color: var(--accent); }

  .course-status {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.4rem 0.8rem 0.4rem 0.7rem;
    background: var(--lg-bg-light);
    backdrop-filter: var(--lg-blur);
    -webkit-backdrop-filter: var(--lg-blur);
    border: 1px solid var(--lg-border);
    border-radius: var(--lg-radius-pill);
    box-shadow: inset 0 1px 0 rgba(245, 241, 235, 0.05);
    font-family: var(--mono);
    font-size: 0.62rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--ink-soft);
  }
  .course-status .pip {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
  }
  .course-status.closed .pip {
    background: var(--ink-mute);
    box-shadow: none;
  }
  .course-status.waitlist .pip { background: var(--warn); box-shadow: 0 0 8px rgba(255, 120, 73, 0.4); }

  .course-title {
    font-family: var(--serif);
    font-weight: 400;
    font-size: clamp(1.6rem, 2.6vw, 2.2rem);
    line-height: 1.05;
    letter-spacing: -0.015em;
    margin-bottom: 0.5rem;
    color: var(--ink);
    position: relative;
    display: inline-block;
  }
  .course-title em {
    font-style: italic;
    font-weight: 300;
    color: var(--ink);
    transition: color 0.5s;
  }
  .course:hover .course-title em { color: var(--accent); }

  .course-tagline {
    font-family: var(--serif);
    font-style: italic;
    font-weight: 300;
    font-size: 1.05rem;
    color: var(--ink-soft);
    margin-bottom: 1.5rem;
    line-height: 1.4;
    max-width: 32ch;
  }

  .course-stats {
    display: flex; flex-wrap: wrap; gap: 0.4rem 0.8rem;
    align-items: center;
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-soft);
    padding: 1rem 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    margin-bottom: 1.4rem;
  }
  .course-stats .sep { color: var(--ink-mute); }

  .course-desc {
    font-size: 0.95rem;
    color: var(--ink-soft);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex: 1;
  }

  .course-tags {
    display: flex; flex-wrap: wrap; gap: 0.5rem;
    margin-bottom: 1.6rem;
  }
  .course-tag {
    font-family: var(--mono);
    font-size: 0.66rem;
    letter-spacing: 0.06em;
    color: var(--ink-soft);
    padding: 0.32rem 0.75rem;
    background: var(--lg-bg-light);
    backdrop-filter: blur(12px) saturate(140%);
    -webkit-backdrop-filter: blur(12px) saturate(140%);
    border: 1px solid var(--lg-border);
    border-radius: var(--lg-radius-pill);
    box-shadow: inset 0 1px 0 rgba(245, 241, 235, 0.04);
    transition: color 0.3s, border-color 0.3s, background 0.3s;
  }
  .course:hover .course-tag {
    border-color: var(--lg-border-strong);
    background: var(--lg-bg);
    color: var(--ink);
  }

  .course-foot {
    display: flex; justify-content: space-between; align-items: center;
    padding-top: 1.2rem;
    border-top: 1px solid var(--line);
    gap: 1rem;
    flex-wrap: wrap;
  }
  .course-instructor {
    font-family: var(--sans);
    font-size: 0.85rem;
    color: var(--ink-soft);
  }
  .course-instructor::before {
    content: "Led by ";
    font-family: var(--mono);
    font-size: 0.66rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-mute);
    margin-right: 0.4rem;
  }
  .course-cta {
    display: inline-flex; align-items: center; gap: 0.45rem;
    color: var(--ink);
    font-family: var(--sans);
    font-size: 0.86rem;
    font-weight: 500;
    position: relative;
    padding-bottom: 2px;
    border-bottom: 1px solid var(--ink-mute);
    transition: color 0.4s, border-color 0.4s;
  }
  .course-cta:hover {
    color: var(--accent);
    border-color: var(--accent);
  }
  .course-cta svg {
    transition: transform 0.4s cubic-bezier(.2,.7,.2,1);
  }
  .course-cta:hover svg { transform: translate(3px, -3px); }

  /* Featured course (first card) — span 2 columns on desktop */
  .course.featured {
    grid-column: 1 / -1;
    background:
      radial-gradient(circle at 90% 30%, rgba(196, 245, 66, 0.06), transparent 50%),
      var(--lg-bg-light);
  }
  .course.featured .course-num {
    font-size: clamp(3.6rem, 6vw, 5.4rem);
  }
  .course.featured .course-title {
    font-size: clamp(2rem, 3.2vw, 2.8rem);
  }
  .course.featured .course-content-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 2.5rem;
  }
  @media (max-width: 720px) {
    .course.featured .course-content-grid { grid-template-columns: 1fr; gap: 1rem; }
  }

  /* SECTION HEAD */

/* ──────────────────────────────────────────────────────────────────
   SECTION HEAD — Eyebrow + title + aside pattern
   ────────────────────────────────────────────────────────────────── */
  .section-head {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 var(--gutter) 3.5rem;
    display: flex; align-items: baseline; justify-content: space-between;
    flex-wrap: wrap; gap: 2rem;
    border-bottom: 1px solid var(--line);
    margin-bottom: 4rem;
  }
  .section-label {
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--ink-mute);
  }
  .section-label::before { content: "§ "; color: var(--accent); }
  .section-title {
    font-family: var(--serif);
    font-weight: 300;
    font-size: clamp(2.2rem, 4vw, 3.6rem);
    letter-spacing: -0.02em;
    line-height: 1;
    max-width: 14ch;
    margin-top: 1rem;
  }
  .section-title em { font-style: italic; color: var(--accent); }
  .section-aside {
    max-width: 42ch;
    color: var(--ink-soft);
    font-size: 0.95rem;
  }
/* ──────────────────────────────────────────────────────────────────
   CTA — Bottom call-to-action section
   ────────────────────────────────────────────────────────────────── */
  .cta {
    border-top: 1px solid var(--line);
    padding: clamp(4rem, 10vh, 7rem) var(--gutter);
    position: relative; overflow: hidden;
    background: var(--bg);
    z-index: 5;
  }
  .cta-inner {
    max-width: var(--maxw);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 3rem;
    align-items: end;
  }
  @media (max-width: 820px) { .cta-inner { grid-template-columns: 1fr; } }
  .cta-headline {
    font-family: var(--serif);
    font-weight: 300;
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 1;
    letter-spacing: -0.02em;
  }
  .cta-headline em { font-style: italic; color: var(--accent); }
  .cta-aside { color: var(--ink-soft); font-size: 0.95rem; max-width: 36ch; }

/* ──────────────────────────────────────────────────────────────────
   BUTTONS — Lime pill primary CTA + variants
   ────────────────────────────────────────────────────────────────── */
  .btn-primary {
    display: inline-flex; align-items: center; gap: 0.7rem;
    padding: 1.05rem 1.7rem;
    background: var(--accent);
    color: var(--bg);
    font-weight: 500;
    font-size: 0.9rem;
    letter-spacing: 0.02em;
    border: 1px solid rgba(196, 245, 66, 0.5);
    border-radius: var(--lg-radius-pill);
    box-shadow: var(--lg-accent-shadow);
    margin-top: 1.6rem;
    transition: transform 0.4s, box-shadow 0.4s;
  }
  .btn-primary:hover {
    box-shadow: var(--lg-accent-shadow-hover);
    transform: translateY(-2px);
  }
  .btn-primary svg { transition: transform 0.4s; }
  .btn-primary:hover svg { transform: translate(4px, -4px); }
/* ──────────────────────────────────────────────────────────────────
   FOOTER — Mono uppercase footer strip
   ────────────────────────────────────────────────────────────────── */
  footer {
    border-top: 1px solid var(--line);
    padding: 2.5rem var(--gutter) 1.6rem;
    background: var(--bg);
    z-index: 5; position: relative;
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--ink-mute);
  }
  .foot-inner {
    max-width: var(--maxw);
    margin: 0 auto;
    display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
  }

/* ──────────────────────────────────────────────────────────────────
   REDUCED MOTION — Disable animations + restore system cursor
   ────────────────────────────────────────────────────────────────── */
  @media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
    body { cursor: auto; }
    .cursor-dot, .cursor-ring { display: none; }
    a, button, .filter, .course { cursor: pointer; }
  }