:root {
  --ink: #08090a;
  --muted: #555b65;
  --line: #cfd3d8;
  --soft: #f1f2f4;
  --blue: #246fd8;
  --blue-soft: #eaf2ff;
  --cyan: #6dcbf4;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #fff; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; line-height: 1.5; }
a { color: var(--blue); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid #8bb8ff; outline-offset: 3px; }

.nav { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 12px 24px; border-bottom: 1px solid var(--line); }
.nav a { font-weight: 700; }
.nav > a:first-child { color: var(--ink); text-decoration: none; }
.nav-links { display: flex; flex-wrap: wrap; gap: 18px; font-size: 14px; }
.course-brand-link { font-size: 16px; font-weight: 900 !important; line-height: 1.1; }
.module-context { min-width: 0; display: grid; gap: 7px; }
.breadcrumbs { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 5px; margin: 0; padding: 0; color: var(--muted); font-size: 12px; list-style: none; }
.breadcrumbs li + li::before { margin-right: 5px; color: #8c929a; content: "/"; }
.breadcrumbs a { color: var(--muted); font-weight: 700; }

.main { width: min(1080px, calc(100% - 36px)); margin: 0 auto; padding: 70px 0 100px; }
.eyebrow { margin: 0 0 12px; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.05; letter-spacing: -.025em; }
h1 { max-width: 980px; margin: 0; font-size: clamp(50px, 7vw, 82px); }
h2 { margin: 76px 0 22px; font-size: clamp(32px, 4vw, 48px); }
h3 { margin: 0 0 10px; font-size: 25px; }
.lede { max-width: 870px; margin: 26px 0 0; color: var(--muted); font-size: 23px; line-height: 1.45; }
.lede.compact { font-size: 20px; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 34px 0 0; }
.button { display: inline-flex; align-items: center; min-height: 46px; padding: 11px 16px; border: 1px solid var(--ink); background: var(--ink); color: #fff; font-weight: 800; text-decoration: none; }
.button.secondary { background: #fff; color: var(--ink); }

.outcome-grid, .agenda-grid, .module-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.card { padding: 24px; border-top: 3px solid var(--ink); background: var(--soft); }
.card p:last-child { margin-bottom: 0; }
.agenda-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.agenda-item { display: grid; grid-template-columns: 76px 1fr; gap: 14px; padding: 17px 0; border-top: 1px solid var(--line); }
.agenda-item strong { color: var(--blue); }

.ladder { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.ladder div { min-height: 170px; padding: 20px 16px; border-right: 1px solid var(--line); }
.ladder div:last-child { border-right: 0; background: var(--blue-soft); }
.ladder strong, .module-card > span { display: block; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .08em; }
.ladder span { display: block; margin-top: 24px; font-size: 20px; font-weight: 800; line-height: 1.1; }
.ladder small { display: block; margin-top: 9px; color: var(--muted); font-size: 14px; }

.module-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 30px; }
.module-card { min-height: 245px; display: grid; align-content: start; padding: 24px; border-top: 3px solid var(--blue); background: var(--soft); }
.module-card h3 { margin-top: 24px; }
.module-card p { color: var(--muted); }
.module-card a { align-self: end; font-weight: 800; }
.notice { margin: 34px 0; padding: 22px; border-left: 4px solid var(--blue); background: var(--blue-soft); }
.supplementary-section { scroll-margin-top: 24px; margin-top: 86px; padding: clamp(22px, 4vw, 38px); background: var(--soft); }
.supplementary-section > h2 { margin-top: 0; }
.resource-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 28px; }
.resource-card { min-height: 220px; padding: 22px; border: 1px solid var(--line); background: #fff; }
.resource-card > span { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.resource-card h3 { margin-top: 20px; }
.resource-card p { color: var(--muted); }
.resource-card a { font-weight: 800; }
.command { overflow-x: auto; margin: 24px 0; padding: 24px; border-left: 4px solid var(--blue); background: #111317; color: #fff; font: 16px/1.65 SFMono-Regular, Consolas, monospace; }
.python-grid { display: grid; gap: 26px; }
.python-card { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr); border-top: 3px solid var(--blue); background: var(--soft); }
.python-card img { display: block; width: 100%; height: 100%; min-height: 290px; object-fit: contain; background: #fff; }
.python-card > div { padding: 28px; }
.python-card span { display: block; margin-bottom: 24px; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .08em; }
.python-card p { color: var(--muted); }
.python-card a { font-weight: 800; }
code { font-family: SFMono-Regular, Consolas, monospace; }
.footer { padding: 22px 24px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }

@media (max-width: 900px) {
  .ladder { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .ladder div:nth-child(3) { border-right: 0; }
  .ladder div:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 720px) {
  .main { padding-top: 46px; }
  .outcome-grid, .agenda-grid, .module-grid, .ladder, .resource-grid { grid-template-columns: 1fr; }
  .python-card { grid-template-columns: 1fr; }
  .ladder div { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .ladder div:last-child { border-bottom: 0; }
  .ladder span { margin-top: 10px; }
  .nav { align-items: flex-start; padding-right: max(16px, env(safe-area-inset-right)); padding-left: max(16px, env(safe-area-inset-left)); }
  .module-context { width: 100%; }
  .breadcrumbs, .nav-links { justify-content: flex-start; }
}