/* ============================================================
   GENADEMY — Design System v2 (Coursera/Udemy-grade ed-tech)
   ============================================================
   Surface: Explore / Learn (catalog + course discovery)
   Palette: clinical blue + warm off-white + emerald accent
   Type:    'Inter' body + 'Space Grotesk' display (Charly system)
   ============================================================ */

:root {
  /* Palette — blue-primary (Coinbase/Webflow/Coursera register) */
  --blue-dark: #0a2540;
  --blue: #146ef5;
  --blue-deep: #0052ff;
  --blue-light: #eaf1fe;
  --blue-accent: #bcd3fb;
  --emerald: #3ddc97;
  --emerald-dim: #2a9d6e;
  --dark: #0a0b0d;
  --ink: #1a1d21;
  --gray: #5b616e;
  --light-gray: #f6f8fb;
  --bg: #ffffff;
  --border: #e2e8f0;
  --amber: #f59e0b;
  --white: #fff;
  --shadow-sm: 0 1px 2px rgba(10,37,64,0.05), 0 1px 3px rgba(10,37,64,0.07);
  --shadow-md: 0 4px 12px rgba(10,37,64,0.08), 0 2px 4px rgba(10,37,64,0.04);
  --shadow-lg: 0 16px 40px rgba(10,37,64,0.14), 0 4px 10px rgba(10,37,64,0.06);

  /* Type */
  --font-display: 'Space Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  /* Radii */
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 20px;

  /* Motion */
  --transition: 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-body); color: var(--ink); line-height: 1.6; background: var(--bg); -webkit-font-smoothing: antialiased; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: none; color: var(--blue); }
img { max-width: 100%; display: block; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ============ NAV (Coursera-style sticky, clean) ============ */
.navbar { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.92); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); }
.navbar-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.nav-brand { display: flex; align-items: center; gap: 10px; }
.nav-brand img { width: 40px; height: 40px; border-radius: 10px; }
.nav-brand-text { font-family: var(--font-display); font-weight: 700; font-size: 21px; letter-spacing: -0.5px; color: var(--blue-dark); }
.nav-brand-text span { color: var(--blue); }
.nav-brand-sub { display: block; font-family: var(--font-body); font-size: 9px; letter-spacing: 2.5px; text-transform: uppercase; color: var(--gray); font-weight: 600; }
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--ink); }
.nav-links a:hover { color: var(--blue); }
.nav-cta { background: var(--blue); color: var(--white) !important; padding: 9px 18px; border-radius: 8px; font-weight: 600; font-size: 14px; }
.nav-cta:hover { background: var(--blue-dark); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--dark); margin: 5px 0; border-radius: 2px; }

/* ============ HERO (Coursera-grade, clean light) ============ */
.hero { background: linear-gradient(180deg, #f2f7ff 0%, #ffffff 100%); padding: 72px 0 56px; border-bottom: 1px solid var(--border); }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero h1 { font-family: var(--font-display); font-size: 46px; font-weight: 700; letter-spacing: -1.5px; line-height: 1.18; color: var(--blue-dark); margin-bottom: 18px; }
.hero h1 em { font-style: normal; color: var(--blue); }
.hero p { font-size: 17px; color: var(--gray); max-width: 540px; margin-bottom: 28px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary { background: var(--blue); color: var(--white); padding: 13px 28px; border-radius: 10px; font-weight: 600; font-size: 15px; display: inline-flex; align-items: center; gap: 8px; transition: var(--transition); box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--blue-dark); color: var(--white); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-secondary { background: var(--white); color: var(--blue-dark); padding: 13px 28px; border-radius: 10px; font-weight: 600; font-size: 15px; border: 1.5px solid var(--blue-accent); transition: var(--transition); }
.btn-secondary:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-light); }
.hero-stats { display: flex; gap: 36px; margin-top: 34px; }
.hero-stat .num { font-family: var(--font-display); font-size: 26px; font-weight: 700; color: var(--blue-dark); }
.hero-stat .lbl { font-size: 12.5px; color: var(--gray); }
.hero-visual { background: var(--blue-light); border-radius: var(--radius-lg); padding: 24px; border: 1px solid var(--blue-accent); position: relative; }
.hero-visual img { border-radius: 12px; width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.hero-badge { position: absolute; top: 36px; right: 36px; background: var(--white); border-radius: 12px; padding: 12px 16px; box-shadow: var(--shadow-lg); font-size: 13px; font-weight: 600; color: var(--blue-dark); display: flex; align-items: center; gap: 8px; }
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--emerald); }

/* ============ SEARCH BAR (Coursera-grade, pill + icon + focus ring) ============ */
.search-wrap { margin-top: 24px; }
.search-box { display: flex; align-items: stretch; background: var(--white); border: 2px solid var(--border); border-radius: 999px; padding: 4px 4px 4px 18px; max-width: 620px; transition: var(--transition); box-shadow: var(--shadow-sm); overflow: hidden; }
.search-box:hover { border-color: var(--blue-accent); box-shadow: var(--shadow-md); }
.search-box:focus-within { border-color: var(--blue); box-shadow: 0 0 0 5px rgba(20,110,245,0.12), var(--shadow-md); }
.search-box .search-icon { color: var(--gray); font-size: 17px; display: flex; align-items: center; flex-shrink: 0; }
.search-box .search-field { flex: 1; display: flex; align-items: center; min-width: 0; }
.search-box input { flex: 1; min-width: 0; border: none; outline: none; font-size: 15px; font-family: var(--font-body); color: var(--dark); padding: 10px 0 10px 12px; background: transparent; }
.search-box input::placeholder { color: #9aa3af; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.search-box .search-divider { width: 1px; background: var(--border); margin: 10px 4px; flex-shrink: 0; }
.search-box button { background: var(--blue); color: var(--white); border: none; padding: 0 26px; border-radius: 999px; font-weight: 600; font-size: 14px; cursor: pointer; transition: var(--transition); white-space: nowrap; }
.search-box button:hover { background: var(--blue-deep); }
.search-trending { margin-top: 12px; font-size: 13px; color: var(--gray); display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.search-trending .chip { background: var(--white); border: 1px solid var(--border); border-radius: 999px; padding: 5px 14px; font-size: 12.5px; font-weight: 500; color: var(--ink); transition: var(--transition); }
.search-trending .chip:hover { border-color: var(--blue); color: var(--blue); }
@media (max-width: 560px) {
  .search-box { border-radius: 16px; padding: 4px; }
  .search-box .search-icon { display: none; }
  .search-box input { padding: 10px 0 10px 10px; }
  .search-box .search-divider { margin: 10px 2px; }
  .search-box button { padding: 0 18px; font-size: 13px; }
}

/* ============ SECTION PRIMITIVES ============ */
.section { padding: 64px 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 28px; gap: 20px; flex-wrap: wrap; }
.section-eyebrow { font-family: var(--font-mono); font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: var(--blue); font-weight: 600; margin-bottom: 8px; }
.section h2 { font-family: var(--font-display); font-size: 30px; font-weight: 700; letter-spacing: -0.8px; color: var(--blue-dark); }
.section .lede { color: var(--gray); font-size: 15.5px; max-width: 620px; margin-top: 8px; }
.section-link { font-size: 14px; font-weight: 600; color: var(--blue); }
.section-link:hover { color: var(--blue-dark); }
.alt-bg { background: var(--light-gray); }

/* ============ COURSE CARDS (Udemy-style catalog) ============ */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.course-card { background: var(--white); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow-sm); transition: var(--transition); display: flex; flex-direction: column; }
.course-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--blue-accent); }
.course-thumb { position: relative; aspect-ratio: 16/10; overflow: hidden; }
.course-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.course-card:hover .course-thumb img { transform: scale(1.04); }
.course-cat { position: absolute; top: 12px; left: 12px; background: rgba(255,255,255,0.94); color: var(--blue-dark); font-size: 11px; font-weight: 700; letter-spacing: 0.5px; text-transform: uppercase; padding: 5px 10px; border-radius: 20px; }
.course-body { padding: 18px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.course-title { font-family: var(--font-display); font-size: 17px; font-weight: 700; color: var(--blue-dark); line-height: 1.3; margin-bottom: 6px; }
.course-title a { color: inherit; }
.course-title a:hover { color: var(--blue); }
.course-instr { font-size: 13px; color: var(--gray); margin-bottom: 10px; }
.course-meta { display: flex; align-items: center; gap: 14px; font-size: 12.5px; color: var(--gray); margin-bottom: 14px; }
.course-rating { color: var(--amber); font-weight: 700; }
.course-badge { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 6px; }
.badge-open { background: #e6f4e6; color: #1d7a3c; }
.badge-soon { background: #f5f0e6; color: #8a6d1d; }
.badge-full { background: #fdecec; color: #b33a3a; }
.course-price { font-size: 15px; font-weight: 700; color: var(--dark); margin-top: auto; }

/* ============ PATHWAY / CATEGORY CHIPS ============ */
.cat-chips { display: flex; gap: 10px; flex-wrap: wrap; }
.cat-chip { background: var(--white); border: 1.5px solid var(--border); border-radius: 24px; padding: 9px 18px; font-size: 14px; font-weight: 500; color: var(--ink); transition: var(--transition); cursor: pointer; }
.cat-chip:hover { border-color: var(--blue); color: var(--blue); }
.cat-chip.active { background: var(--blue); color: var(--white); border-color: var(--blue); }

/* ============ MODEL / STEPS ============ */
.steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; }
.step-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; transition: var(--transition); }
.step-card:hover { border-color: var(--blue-accent); box-shadow: var(--shadow-sm); }
.step-num { font-family: var(--font-mono); font-size: 22px; font-weight: 600; color: var(--blue-accent); margin-bottom: 8px; }
.step-card h4 { font-family: var(--font-display); font-size: 15px; color: var(--blue-dark); margin-bottom: 4px; }
.step-card p { font-size: 13px; color: var(--gray); }

/* ============ FACULTY ============ */
.faculty-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.faculty-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow-sm); }
.faculty-avatar { width: 56px; height: 56px; border-radius: 50%; background: var(--blue-light); display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-weight: 700; font-size: 22px; color: var(--blue); margin-bottom: 14px; }
.faculty-role { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--blue); margin-bottom: 6px; }
.faculty-card h3 { font-family: var(--font-display); font-size: 18px; color: var(--blue-dark); margin-bottom: 8px; }
.faculty-card p { font-size: 14px; color: var(--gray); }

/* ============ TESTIMONIALS ============ */
.testimonial-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.testimonial { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow-sm); }
.testimonial .stars { color: var(--amber); margin-bottom: 12px; font-size: 14px; letter-spacing: 2px; }
.testimonial p { font-size: 14.5px; color: var(--ink); font-style: italic; margin-bottom: 14px; }
.testimonial .who { font-size: 13px; color: var(--gray); font-weight: 600; }

/* ============ REGISTER BAND ============ */
.cta-band { background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue-deep) 100%); border-radius: var(--radius-lg); padding: 56px; text-align: center; color: var(--white); position: relative; overflow: hidden; }
.cta-band h2 { font-family: var(--font-display); font-size: 32px; font-weight: 700; color: var(--white); margin-bottom: 12px; }
.cta-band p { font-size: 16px; color: rgba(255,255,255,0.9); max-width: 560px; margin: 0 auto 24px; }
.cta-band .btn-white { background: var(--white); color: var(--blue-dark); padding: 14px 32px; border-radius: 10px; font-weight: 700; font-size: 15px; display: inline-flex; align-items: center; gap: 8px; transition: var(--transition); }
.cta-band .btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); color: var(--blue-dark); }

/* ============ FOOTER (world-class, image-intertwined) ============ */
.footer { background: var(--blue-dark); color: rgba(255,255,255,0.8); padding: 0 0 28px; position: relative; overflow: hidden; }
.footer::before { content: ''; position: absolute; top: -120px; right: -120px; width: 420px; height: 420px; border-radius: 50%; border: 1px solid rgba(255,255,255,0.05); }
.footer::after { content: ''; position: absolute; top: -60px; right: -60px; width: 280px; height: 280px; border-radius: 50%; border: 1px solid rgba(255,255,255,0.04); }
.footer-top { position: relative; border-bottom: 1px solid rgba(255,255,255,0.1); padding: 48px 0 40px; }
.footer-cta { display: grid; grid-template-columns: 1fr 1.4fr; gap: 48px; align-items: center; }
.footer-cta-left h2 { font-family: var(--font-display); font-size: 26px; color: var(--white); letter-spacing: -0.5px; margin-bottom: 8px; }
.footer-cta-left p { font-size: 14px; color: rgba(255,255,255,0.65); max-width: 360px; }
.footer-newsletter { display: flex; gap: 10px; flex-wrap: wrap; }
.footer-newsletter input { flex: 1; min-width: 200px; padding: 13px 18px; border-radius: 999px; border: 1px solid rgba(255,255,255,0.2); background: rgba(255,255,255,0.08); color: var(--white); font-size: 14px; font-family: var(--font-body); outline: none; }
.footer-newsletter input::placeholder { color: rgba(255,255,255,0.5); }
.footer-newsletter input:focus { border-color: var(--emerald); }
.footer-newsletter button { background: var(--emerald); color: var(--blue-dark); border: none; padding: 13px 28px; border-radius: 999px; font-weight: 700; font-size: 14px; cursor: pointer; font-family: var(--font-body); transition: var(--transition); }
.footer-newsletter button:hover { background: #2fd48a; transform: translateY(-1px); }
.footer-newsletter .fine { width: 100%; font-size: 11.5px; color: rgba(255,255,255,0.45); }
.footer-main { position: relative; display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; padding: 44px 0 36px; }
.footer-brand-row { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-brand-row img { width: 34px; height: 34px; }
.footer-brand { font-family: var(--font-display); font-size: 21px; font-weight: 700; color: var(--white); }
.footer p { font-size: 13px; color: rgba(255,255,255,0.6); max-width: 300px; line-height: 1.6; }
.footer h4 { font-family: var(--font-display); font-size: 14px; color: var(--white); margin-bottom: 16px; letter-spacing: 0.3px; }
.footer a { display: block; font-size: 13.5px; color: rgba(255,255,255,0.65); margin-bottom: 10px; transition: var(--transition); }
.footer a:hover { color: var(--emerald); transform: translateX(2px); }
.footer-cohort { display: flex; gap: 14px; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); border-radius: 16px; padding: 12px; align-items: center; transition: var(--transition); }
.footer-cohort:hover { border-color: var(--emerald); background: rgba(255,255,255,0.1); }
.footer-cohort img { width: 64px; height: 64px; border-radius: 10px; object-fit: cover; flex-shrink: 0; }
.footer-cohort .fc-name { font-size: 13px; font-weight: 600; color: var(--white); margin-bottom: 4px; }
.footer-cohort .fc-status { font-size: 11.5px; color: var(--emerald); font-weight: 600; }
.footer-bottom { position: relative; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 22px; text-align: center; font-size: 12.5px; color: rgba(255,255,255,0.5); }
.reg-line { max-width: 760px; margin: 14px auto 0; font-size: 11.5px; line-height: 1.5; color: rgba(255,255,255,0.4); }
@media (max-width: 900px) {
  .footer-main { grid-template-columns: 1fr 1fr; }
  .footer-cta { grid-template-columns: 1fr; gap: 20px; }
}
@media (max-width: 560px) {
  .footer-main { grid-template-columns: 1fr; }
}

/* ============ PAGE HERO (inner pages) ============ */
.page-hero { background: linear-gradient(180deg, #f2f7ff 0%, #ffffff 100%); padding: 56px 0 40px; border-bottom: 1px solid var(--border); }
.page-hero h1 { font-family: var(--font-display); font-size: 38px; font-weight: 700; letter-spacing: -1px; color: var(--blue-dark); margin-bottom: 10px; }
.page-hero p { font-size: 16px; color: var(--gray); max-width: 640px; }

/* ============ COURSE DETAIL (Coursera/Udemy-grade) ============ */
.course-hero { background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 100%); color: var(--white); padding: 48px 0; }
.course-hero .crumb { font-family: var(--font-mono); font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--blue-accent); margin-bottom: 12px; }
.course-hero .crumb a { color: var(--blue-accent); }
.course-hero h1 { font-family: var(--font-display); font-size: 36px; font-weight: 700; letter-spacing: -1px; max-width: 720px; margin-bottom: 12px; }
.course-hero .tagline { font-size: 16px; color: rgba(255,255,255,0.9); max-width: 640px; margin-bottom: 18px; }
.course-hero-meta { display: flex; gap: 24px; flex-wrap: wrap; font-size: 13.5px; color: rgba(255,255,255,0.85); }
.course-hero-meta .rating { color: #ffd166; font-weight: 700; }
.course-hero-meta .badge { background: rgba(255,255,255,0.15); padding: 4px 12px; border-radius: 20px; font-size: 12px; }
.course-layout { display: grid; grid-template-columns: 1fr 340px; gap: 36px; align-items: start; }
.course-main { min-width: 0; }
.course-rail { position: sticky; top: 88px; background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.course-rail img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.course-rail-body { padding: 22px; }
.course-rail .price { font-family: var(--font-display); font-size: 26px; font-weight: 700; color: var(--blue-dark); margin-bottom: 6px; }
.course-rail .price small { font-size: 13px; color: var(--gray); font-weight: 400; }
.course-rail .btn-primary, .course-rail .btn-secondary { width: 100%; justify-content: center; margin-top: 8px; }
.course-rail .rail-meta { margin-top: 16px; border-top: 1px solid var(--border); padding-top: 14px; font-size: 13px; color: var(--gray); }
.course-rail .rail-meta div { display: flex; justify-content: space-between; margin-bottom: 8px; }
.course-rail .rail-meta strong { color: var(--ink); }
.panel { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; margin-bottom: 20px; box-shadow: var(--shadow-sm); }
.panel h3 { font-family: var(--font-display); font-size: 20px; color: var(--blue-dark); margin-bottom: 14px; }
.learn-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 20px; }
.learn-grid li { font-size: 14px; color: var(--ink); list-style: none; display: flex; gap: 10px; align-items: flex-start; }
.learn-grid li::before { content: "✓"; color: var(--blue); font-weight: 700; }
/* Curriculum accordion */
.accordion-item { border: 1px solid var(--border); border-radius: 10px; margin-bottom: 10px; overflow: hidden; }
.accordion-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; cursor: pointer; background: var(--light-gray); transition: var(--transition); }
.accordion-head:hover { background: var(--blue-light); }
.accordion-head h4 { font-family: var(--font-display); font-size: 15px; color: var(--blue-dark); }
.accordion-head .meta { font-size: 12px; color: var(--gray); font-family: var(--font-mono); }
.accordion-head .chev { transition: transform 0.25s; color: var(--blue); font-size: 13px; }
.accordion-item.open .chev { transform: rotate(180deg); }
.accordion-body { display: none; padding: 4px 18px 16px; }
.accordion-item.open .accordion-body { display: block; }
.accordion-body ul { list-style: none; margin-top: 8px; }
.accordion-body li { font-size: 13.5px; color: var(--ink); padding: 8px 0; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; gap: 10px; }
.accordion-body li:last-child { border-bottom: none; }
.accordion-body .dur { font-family: var(--font-mono); font-size: 11.5px; color: var(--gray); white-space: nowrap; }
/* Reviews */
.review-summary { display: grid; grid-template-columns: 160px 1fr; gap: 24px; align-items: center; margin-bottom: 18px; }
.review-score { text-align: center; }
.review-score .num { font-family: var(--font-display); font-size: 44px; font-weight: 700; color: var(--blue-dark); line-height: 1; }
.review-score .stars { color: var(--amber); font-size: 15px; letter-spacing: 3px; margin-top: 4px; }
.review-bars { display: flex; flex-direction: column; gap: 6px; }
.review-bar-row { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--gray); }
.review-bar-row .lbl { width: 20px; text-align: right; }
.review-bar { flex: 1; height: 8px; background: var(--light-gray); border-radius: 4px; overflow: hidden; }
.review-bar .fill { height: 100%; background: var(--blue); border-radius: 4px; }
.review-item { border-top: 1px solid var(--border); padding: 16px 0; }
.review-item .who { font-size: 13px; font-weight: 600; color: var(--ink); }
.review-item .when { font-size: 12px; color: var(--gray); }
.review-item .stars { color: var(--amber); font-size: 12px; letter-spacing: 2px; margin: 4px 0; }
.review-item p { font-size: 14px; color: var(--ink); }
/* Instructor rail card */
.instructor-card { display: flex; gap: 14px; align-items: center; margin-bottom: 14px; }
.instructor-avatar { width: 56px; height: 56px; border-radius: 50%; background: var(--blue-light); display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-weight: 700; font-size: 20px; color: var(--blue); flex-shrink: 0; }
.instructor-photo { width: 64px; height: 64px; border-radius: 50%; overflow: hidden; flex-shrink: 0; background: var(--blue-light); }
.instructor-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.instructor-card .name { font-family: var(--font-display); font-size: 16px; font-weight: 600; color: var(--blue-dark); }
.instructor-card .role { font-family: var(--font-mono); font-size: 11px; color: var(--gray); text-transform: uppercase; letter-spacing: 1px; }

/* ============ CATALOG (Udemy browse) ============ */
.catalog-layout { display: grid; grid-template-columns: 240px 1fr; gap: 32px; align-items: start; }
.catalog-filters { position: sticky; top: 88px; }
.filter-group { margin-bottom: 22px; }
.filter-group h4 { font-family: var(--font-display); font-size: 14px; color: var(--blue-dark); margin-bottom: 10px; }
.filter-group label { display: flex; align-items: center; gap: 9px; font-size: 13.5px; color: var(--ink); margin-bottom: 8px; cursor: pointer; }
.filter-group input[type=checkbox], .filter-group input[type=radio] { accent-color: var(--blue); width: 15px; height: 15px; }
.catalog-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }
.catalog-toolbar .count { font-size: 14px; color: var(--gray); }
.catalog-toolbar select { padding: 9px 14px; border: 1.5px solid var(--border); border-radius: 8px; font-size: 13.5px; font-family: var(--font-body); background: var(--white); cursor: pointer; }
.empty-state { text-align: center; padding: 48px 0; color: var(--gray); }
.empty-state h3 { font-family: var(--font-display); color: var(--blue-dark); margin-bottom: 6px; }

/* ============ COHORT CARDS ============ */
.cohort-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow-sm); }
.cohort-card .date { font-family: var(--font-display); font-size: 17px; font-weight: 700; color: var(--blue-dark); }
.cohort-card .course { font-size: 13.5px; color: var(--gray); margin-bottom: 6px; }
.cohort-card .spots { font-size: 12.5px; color: var(--emerald-dim); font-weight: 600; margin-bottom: 12px; }

/* ============ BREADCRUMB ============ */
.breadcrumb { font-family: var(--font-mono); font-size: 11px; letter-spacing: 1px; text-transform: uppercase; color: var(--gray); margin-bottom: 18px; }
.breadcrumb a { color: var(--gray); }
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb span { margin: 0 6px; color: var(--blue-accent); }

/* ============ RESPONSIVE (extended) ============ */
@media (max-width: 900px) {
  .course-layout { grid-template-columns: 1fr; }
  .course-rail { position: static; }
  .catalog-layout { grid-template-columns: 1fr; }
  .catalog-filters { position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .learn-grid { grid-template-columns: 1fr; }
  .review-summary { grid-template-columns: 1fr; }
  .course-hero h1 { font-size: 28px; }
}
@media (max-width: 560px) {
  .catalog-filters { grid-template-columns: 1fr; }
  .course-hero { padding: 32px 0; }
}
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero h1 { font-size: 34px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; background: var(--white); border-bottom: 1px solid var(--border); padding: 16px 24px; flex-direction: column; align-items: flex-start; gap: 14px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
}
@media (max-width: 560px) {
  .section { padding: 44px 0; }
  .hero { padding: 44px 0 36px; }
  .hero h1 { font-size: 30px; letter-spacing: -1px; line-height: 1.2; }
  .cta-band { padding: 36px 24px; }
  .course-grid { grid-template-columns: 1fr; }
}