:root {
  --ink: #16202f;
  --muted: #5d6878;
  --line: #d9e0e9;
  --paper: #ffffff;
  --surface: #f4f7f9;
  --teal: #0f766e;
  --teal-dark: #0b514d;
  --teal-soft: #e8f5f2;
  --blue: #2563eb;
  --blue-soft: #edf4ff;
  --mono: "JetBrains Mono", Consolas, monospace;
  --sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --shadow: 0 20px 55px rgba(25, 45, 62, 0.09);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: var(--sans);
  line-height: 1.55;
}

a { color: inherit; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  color: #fff;
  background: var(--ink);
  border-radius: 7px;
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(217, 224, 233, 0.9);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--teal);
  border-radius: 11px;
  font-family: var(--mono);
  font-size: 1.2rem;
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(15, 118, 110, 0.24);
}

.brand strong,
.brand small { display: block; }

.brand strong { font-size: 0.98rem; }

.brand small { color: var(--muted); font-size: 0.76rem; }

.site-header nav { display: flex; align-items: center; gap: 6px; }

.site-header nav a {
  padding: 9px 12px;
  color: var(--muted);
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 700;
}

.site-header nav a:hover,
.site-header nav a:focus-visible { color: var(--teal-dark); background: var(--teal-soft); }

main { overflow: hidden; }

.hero {
  position: relative;
  max-width: 1440px;
  min-height: 630px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  align-items: center;
  gap: clamp(42px, 7vw, 110px);
  margin: 0 auto;
  padding: clamp(70px, 10vw, 132px) clamp(22px, 6vw, 92px);
}

.hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  width: 480px;
  height: 480px;
  right: -150px;
  top: -160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.13), rgba(37, 99, 235, 0));
}

.eyebrow,
.unit-label {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(3rem, 6.1vw, 6.3rem);
  line-height: 0.98;
  letter-spacing: -0.065em;
}

.hero h1 span { color: var(--teal); }

.hero-lead {
  max-width: 690px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  line-height: 1.75;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 12px 19px;
  border: 1px solid transparent;
  border-radius: 9px;
  text-decoration: none;
  font-weight: 800;
}

.button-primary { color: #fff; background: var(--teal); box-shadow: 0 12px 26px rgba(15, 118, 110, 0.22); }
.button-primary:hover { background: var(--teal-dark); }
.button-secondary { background: var(--paper); border-color: var(--line); }
.button-secondary:hover { border-color: var(--teal); color: var(--teal-dark); }

.mentor { margin: 24px 0 0; color: var(--muted); font-size: 0.88rem; }
.mentor strong { color: var(--ink); }

.course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.course-meta span {
  padding: 7px 10px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid var(--line);
  border-radius: 7px;
  font-size: 0.75rem;
}

.course-meta strong { color: var(--ink); }

.learning-map {
  padding: clamp(22px, 3vw, 34px);
  background: linear-gradient(145deg, #ffffff, #f8fbfc);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.learning-map article {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 24px;
  background: var(--blue-soft);
  border: 1px solid #cbdcf8;
  border-radius: 16px;
}

.learning-map article.map-accent { background: var(--teal-soft); border-color: #b9ded7; }

.learning-map article.map-enterprise {
  background: #fff7ed;
  border-color: #fed7aa;
}

.map-number {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--blue);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 700;
}

.map-accent .map-number { background: var(--teal); }
.map-enterprise .map-number { background: #c2410c; }
.learning-map small { display: block; color: var(--muted); font-size: 0.68rem; font-weight: 800; letter-spacing: 0.13em; }
.learning-map strong { display: block; margin-top: 4px; font-size: 1.18rem; }
.learning-map p { margin: 6px 0 0; color: var(--muted); font-size: 0.9rem; }
.map-arrow { display: block; padding: 7px 0; text-align: center; color: var(--teal); font-size: 1.5rem; }

.stats {
  max-width: 1280px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0 auto;
  background: var(--ink);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.stats div { padding: 24px 28px; border-right: 1px solid rgba(255, 255, 255, 0.13); }
.stats div:last-child { border-right: 0; }
.stats strong { display: block; color: #fff; font-size: 1.55rem; }
.stats span { color: #bac5d2; font-size: 0.85rem; }

.catalog { max-width: 1280px; margin: 0 auto; padding: 105px 0 120px; }

.course-section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 105px 0 25px;
  scroll-margin-top: 72px;
}

.course-section + .course-section { padding-top: 90px; }

.section-heading {
  display: grid;
  grid-template-columns: 1fr minmax(320px, 0.7fr);
  align-items: end;
  gap: 50px;
  margin-bottom: 34px;
}

.section-heading h2 { margin: 0; font-size: clamp(2.2rem, 4vw, 4rem); letter-spacing: -0.045em; }
.section-heading > p { margin: 0; color: var(--muted); line-height: 1.75; }

.status-key {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin: -8px 0 24px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.status-key span { display: inline-flex; align-items: center; gap: 7px; }

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #94a3b8;
}

.status-dot.available { background: #047857; }
.status-dot.partial { background: #d97706; }
.status-dot.planned { background: #64748b; }

.syllabus-grid { display: grid; gap: 22px; }

.syllabus-unit {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.syllabus-unit > header {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 25px 28px;
  border-top: 5px solid var(--blue);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(120deg, #eef5ff, #fff 65%);
}

.syllabus-unit-two > header {
  border-top-color: var(--teal);
  background: linear-gradient(120deg, #eaf7f4, #fff 65%);
}

.syllabus-unit-three > header {
  border-top-color: #c2410c;
  background: linear-gradient(120deg, #fff7ed, #fff 65%);
}

.syllabus-unit header p {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.syllabus-unit header h3 {
  margin: 0;
  font-size: clamp(1.25rem, 2vw, 1.72rem);
  letter-spacing: -0.025em;
}

.status-badge,
.planned-label {
  padding: 7px 10px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 800;
  white-space: nowrap;
}

.status-available { color: #065f46; background: #d1fae5; }
.status-partial { color: #92400e; background: #fef3c7; }
.status-planned,
.planned-label { color: #475569; background: #e2e8f0; }

.chapter-outline { padding: 4px 28px 10px; }

.chapter-row {
  min-height: 106px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.chapter-row:last-child { border-bottom: 0; }

.chapter-code {
  min-width: 48px;
  padding: 8px;
  text-align: center;
  color: var(--teal-dark);
  background: var(--teal-soft);
  border-radius: 7px;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
}

.syllabus-unit-three .chapter-code { color: #9a3412; background: #ffedd5; }
.chapter-row h4 { margin: 0; font-size: 1rem; }
.chapter-row p { margin: 5px 0 0; color: var(--muted); font-size: 0.85rem; }
.chapter-row > a { display: inline-flex; align-items: center; gap: 6px; color: var(--teal-dark); text-decoration: none; font-size: 0.78rem; font-weight: 800; white-space: nowrap; }
.chapter-row > a:hover { text-decoration: underline; }
.chapter-planned { background: linear-gradient(90deg, transparent, rgba(241, 245, 249, 0.7)); }

.search-panel {
  display: grid;
  grid-template-columns: auto minmax(240px, 1fr) auto;
  align-items: center;
  gap: 18px;
  margin-bottom: 24px;
  padding: 16px 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 8px 26px rgba(25, 45, 62, 0.05);
}

.search-panel label { font-weight: 800; }
.search-control { display: flex; align-items: center; gap: 10px; min-height: 45px; padding: 0 12px; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; }
.search-control:focus-within { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12); }
.search-control span { color: var(--teal); font-size: 1.3rem; }
.search-control input { width: 100%; border: 0; outline: 0; color: var(--ink); background: transparent; font: inherit; }
.search-control button { padding: 5px 8px; border: 0; border-radius: 5px; color: var(--teal-dark); background: var(--teal-soft); font-weight: 800; cursor: pointer; }
.search-status { margin: 0; color: var(--muted); font-size: 0.82rem; white-space: nowrap; }

.unit-grid { display: grid; gap: 26px; }

.unit-card {
  scroll-margin-top: 100px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.unit-card-header {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 34px;
  padding: clamp(26px, 4vw, 45px);
  background: linear-gradient(120deg, #eef5ff, #ffffff 68%);
  border-top: 5px solid var(--blue);
  border-bottom: 1px solid var(--line);
}

.unit-card-two .unit-card-header { background: linear-gradient(120deg, #eaf7f4, #ffffff 68%); border-top-color: var(--teal); }
.unit-card-header h2 { margin: 0; font-size: clamp(1.7rem, 3vw, 2.6rem); letter-spacing: -0.035em; }
.unit-card-header p:not(.unit-label) { max-width: 760px; margin: 10px 0 0; color: var(--muted); }

.unit-open { display: inline-flex; align-items: center; gap: 8px; padding: 11px 15px; color: #fff; background: var(--ink); border-radius: 8px; text-decoration: none; font-weight: 800; white-space: nowrap; }
.unit-open:hover { background: var(--teal-dark); }

.topic-groups { display: grid; gap: 36px; padding: clamp(24px, 4vw, 44px); }
.topic-group[hidden] { display: none; }
.topic-group h3 { display: flex; align-items: center; gap: 12px; margin: 0 0 14px; font-size: 1rem; }
.topic-group h3 span { padding: 5px 9px; color: var(--teal-dark); background: var(--teal-soft); border-radius: 6px; font-family: var(--mono); font-size: 0.72rem; }
.topic-group ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; margin: 0; padding: 0; list-style: none; }
.topic-group li[hidden] { display: none; }
.topic-group a { position: relative; min-height: 74px; display: grid; align-content: center; gap: 3px; padding: 13px 42px 13px 15px; border: 1px solid var(--line); border-radius: 9px; text-decoration: none; transition: border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease; }
.topic-group a::after { content: "→"; position: absolute; right: 15px; top: 50%; color: var(--teal); transform: translateY(-50%); font-weight: 800; }
.topic-group a:hover,
.topic-group a:focus-visible { border-color: var(--teal); transform: translateY(-2px); box-shadow: 0 9px 22px rgba(15, 118, 110, 0.09); }
.topic-group small { color: var(--teal); font-size: 0.67rem; font-weight: 800; letter-spacing: 0.04em; text-transform: uppercase; }
.topic-group a span { font-weight: 700; }

.unit-card.no-matches { display: none; }
.no-results { padding: 30px; text-align: center; color: var(--muted); background: var(--paper); border: 1px dashed var(--line); border-radius: 12px; }

.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.roadmap-grid article {
  padding: 24px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 13px;
  box-shadow: 0 12px 34px rgba(25, 45, 62, 0.06);
}

.roadmap-grid header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--line);
}

.roadmap-grid header span { color: var(--teal); font-family: var(--mono); font-size: 0.75rem; font-weight: 700; }
.roadmap-grid header strong { font-size: 0.8rem; }
.roadmap-grid ol { display: grid; gap: 12px; margin: 18px 0 0; padding: 0; list-style: none; }
.roadmap-grid li { display: grid; grid-template-columns: 30px 1fr; gap: 8px; color: var(--muted); font-size: 0.83rem; }
.roadmap-grid li b { color: var(--ink); font-family: var(--mono); font-size: 0.72rem; }

.roadmap-available { border-color: #99d5cc !important; box-shadow: 0 14px 36px rgba(15, 118, 110, 0.10) !important; }
.roadmap-open { display: inline-flex; align-items: center; gap: 7px; margin-top: 20px; padding: 10px 13px; color: #fff; background: var(--teal); border-radius: 8px; text-decoration: none; font-size: 0.8rem; font-weight: 800; }
.roadmap-open:hover { color: #fff; background: var(--teal-dark); }

.outcomes-section { padding-bottom: 115px; }

.outcome-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.outcome-list li {
  min-height: 190px;
  display: grid;
  align-content: start;
  gap: 16px;
  padding: 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.outcome-list li > span {
  width: 45px;
  height: 34px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--ink);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
}

.outcome-list p { margin: 0; color: var(--muted); font-size: 0.82rem; }
.outcome-list strong { color: var(--ink); }

footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 30px;
  padding: 34px clamp(22px, 5vw, 72px);
  color: #bac5d2;
  background: var(--ink);
  font-size: 0.82rem;
}

footer strong,
footer span { display: block; }
footer strong { color: #fff; }
footer p { margin: 0; }

@media (max-width: 1320px) {
  .stats,
  .catalog,
  .course-section { margin-left: 24px; margin-right: 24px; }
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .learning-map { max-width: 680px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stats div:nth-child(2) { border-right: 0; }
  .stats div:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.13); }
  .section-heading { grid-template-columns: 1fr; gap: 16px; }
  .unit-card-header { grid-template-columns: 1fr; align-items: start; }
  .roadmap-grid { grid-template-columns: 1fr; }
  .outcome-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  footer { grid-template-columns: 1fr; gap: 10px; }
}

@media (max-width: 680px) {
  .site-header { align-items: flex-start; }
  .site-header nav { max-width: 50%; flex-wrap: wrap; justify-content: flex-end; }
  .site-header nav a { padding: 6px 7px; font-size: .78rem; }
  .hero { padding-top: 66px; }
  .hero h1 { font-size: clamp(2.75rem, 15vw, 4.5rem); }
  .stats,
  .catalog,
  .course-section { margin-left: 14px; margin-right: 14px; }
  .catalog { padding-top: 78px; }
  .course-section { padding-top: 78px; }
  .search-panel { grid-template-columns: 1fr; gap: 8px; }
  .search-status { white-space: normal; }
  .syllabus-unit > header { grid-template-columns: 1fr; align-items: start; padding: 22px 18px; }
  .chapter-outline { padding-left: 18px; padding-right: 18px; }
  .chapter-row { grid-template-columns: auto 1fr; gap: 12px; }
  .chapter-row > a,
  .chapter-row > .planned-label { grid-column: 2; justify-self: start; }
  .topic-group ol { grid-template-columns: 1fr; }
  .unit-open { justify-content: center; }
  .outcome-list { grid-template-columns: 1fr; }
  .outcome-list li { min-height: 0; }
  footer { padding-left: 22px; padding-right: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}