:root {
  color-scheme: light;
  --ink: #1f2933;
  --muted: #5b6776;
  --paper: #f7f3ea;
  --panel: #ffffff;
  --line: #d9d2c3;
  --accent: #0f766e;
  --accent-dark: #115e59;
  --gold: #b7791f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: inherit;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.brand {
  color: var(--accent-dark);
  font-weight: 800;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

nav a {
  text-decoration: none;
}

.page {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0;
}

.hero {
  max-width: 700px;
  padding: 56px 0;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(36px, 7vw, 70px);
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin: 10px 0;
  font-size: 22px;
}

p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.65;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 12px;
  padding: 0 18px;
  border-radius: 6px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  margin: 28px 0 14px;
}

.section-head h2,
.table-title {
  margin: 0;
  font-size: 24px;
  line-height: 1.2;
}

.table-title {
  margin: 28px 0 12px;
}

.search-form {
  display: grid;
  gap: 10px;
  max-width: 720px;
  margin: 18px 0 28px;
}

.search-form label {
  color: var(--ink);
  font-weight: 800;
}

.search-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.search-row input {
  min-height: 44px;
  width: 100%;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #ffffff;
  color: var(--ink);
  font: inherit;
}

.search-row .button {
  margin-top: 0;
  border: 0;
  cursor: pointer;
}

.search-summary {
  margin: 0 0 8px;
  font-size: 15px;
}

.course-card {
  display: flex;
  flex-direction: column;
  min-height: 220px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.course-card-paid {
  border-color: rgba(15, 118, 110, 0.35);
  background: linear-gradient(180deg, #ffffff 0%, #f1fbf8 100%);
}

.course-card span {
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
}

.course-card p {
  font-size: 15px;
}

.course-card a {
  margin-top: auto;
  padding-top: 16px;
}

.course-card a,
.back {
  color: var(--accent-dark);
  font-weight: 800;
}

.back {
  display: inline-flex;
  align-items: center;
  margin-bottom: 18px;
  text-decoration: none;
}

.table {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--panel);
}

.row {
  display: grid;
  grid-template-columns: 1.4fr 1fr 140px;
  gap: 20px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

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

.row span {
  color: var(--muted);
}

.empty-row {
  padding: 18px 20px;
  color: var(--muted);
}

.detail {
  max-width: 780px;
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.locked-course {
  border-color: rgba(183, 121, 31, 0.42);
}

dl {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 28px 0 8px;
}

dt {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

dd {
  margin: 6px 0 0;
  font-weight: 700;
}

.promo-form {
  display: grid;
  gap: 10px;
  margin-top: 28px;
}

.promo-form label {
  color: var(--ink);
  font-weight: 800;
}

.promo-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.promo-row input {
  min-height: 44px;
  width: 100%;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #ffffff;
  color: var(--ink);
  font: inherit;
}

.promo-row .button {
  margin-top: 0;
  border: 0;
  cursor: pointer;
}

.form-message {
  margin: 0;
  color: var(--gold);
  font-size: 15px;
  font-weight: 700;
}

.course-content {
  display: grid;
  gap: 16px;
  margin-top: 24px;
  color: var(--ink);
}

.course-content h2,
.course-content h3,
.course-content h4,
.course-content p,
.course-content ul {
  margin: 0;
}

.course-content h2 {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  color: var(--accent-dark);
  font-size: 32px;
  line-height: 1.15;
}

.course-content h3 {
  margin-top: 14px;
  color: var(--ink);
  font-size: 24px;
  line-height: 1.25;
}

.course-content h4 {
  color: var(--gold);
  font-size: 16px;
  line-height: 1.35;
  text-transform: uppercase;
}

.course-content p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
}

.course-content ul {
  display: grid;
  gap: 8px;
  padding-left: 24px;
  color: var(--ink);
}

.course-content li {
  line-height: 1.55;
}

.course-content code {
  padding: 2px 5px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #f3efe5;
  color: var(--accent-dark);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

@media (max-width: 680px) {
  .topbar,
  nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .detail {
    padding: 24px;
  }

  .promo-row {
    grid-template-columns: 1fr;
  }

  .search-row {
    grid-template-columns: 1fr;
  }
}