/* ============================================================
   Copilot x Sectors course site
   Page structure follows Hermes-Material; every colour, font,
   radius, space and shadow comes from the Algoritma design system
   (Supertype Foundations 0.4.2). Hex values live only in the two
   token blocks below.
   ============================================================ */

/* ---------- Tokens: light (paper) ---------- */
:root {
  --background: #faf6ed;
  --card: #fffdf8;
  --popover: #fffdf8;
  --muted: #f0e8d4;
  --accent: #e3e8ed;
  --sidebar: #f5efe1;

  --foreground: #001017;
  --card-foreground: #001017;
  --muted-foreground: #4a535c;
  --subtle-foreground: #6a7c8c;
  --accent-foreground: #22303d;

  --primary: #3e526a;
  --primary-foreground: #faf6ed;
  --primary-ink: #28568a;

  --secondary: #c9a96d;
  --secondary-foreground: #001017;
  --secondary-ink: #74551f;

  --border: #d6cbb3;
  --input: #d6cbb3;
  --ring: #3e526a;

  --success: #12813b;
  --success-ink: #17783a;
  --warn: #db6e00;
  --warn-ink: #aa470e;
  --info: #166bc5;
  --info-ink: #1463b8;
  --danger: #bd2c1f;
  --chart-1: #2e65a0;

  --elevation-raised: 0 1px 2px -1px hsl(198 100% 5% / 0.1), 0 4px 12px -2px hsl(198 100% 5% / 0.1);
  --elevation-overlay: 0 6px 16px -4px hsl(198 100% 5% / 0.14), 0 16px 40px -12px hsl(198 100% 5% / 0.22);

  /* Diagram strokes: Slate on paper */
  --dg-line: var(--ring);

  /* Type */
  --sans: "Ubuntu Sans", ui-sans-serif, system-ui, sans-serif;
  --editorial: "Average", ui-serif, Georgia, serif;
  --mono: "Ubuntu Sans Mono", ui-monospace, SFMono-Regular, monospace;
  --editorial-h1: 36px;
  --editorial-h2: 30px;
  --editorial-h3: 24px;
  --editorial-h4: 20px;
  --reading-lg: 18px;
  --reading: 16px;
  --reading-sm: 14px;
  --reading-xs: 12px;
  --label: 11px;
  --code: 14px;

  /* Foundations 4px scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --flow-lead: 1rem;
  --flow-space: 1.5rem;
  --flow-section: 4rem;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 10px;
  --radius-xl: 12px;
  --radius-2xl: 18px;
  --radius-pill: 9999px;

  --nav-h: 56px;
  color-scheme: light;
}

/* ---------- Tokens: dark (Midnight) ---------- */
:root.dark {
  --background: #001017;
  --card: #0d1921;
  --popover: #0d1921;
  --muted: #22303d;
  --accent: #14273a;
  --sidebar: #06141d;

  --foreground: #f0e8d4;
  --card-foreground: #f0e8d4;
  --muted-foreground: #bfccd8;
  --subtle-foreground: #7f91a2;
  --accent-foreground: #c5d4e0;

  --primary: #3e6488;
  --primary-foreground: #f0e8d4;
  --primary-ink: #acc9e3;

  --secondary: #c9a96d;
  --secondary-foreground: #001017;
  --secondary-ink: #c9a96d;

  --border: #23384b;
  --input: #23384b;
  --ring: #7f9bb1;

  --success: #12813b;
  --success-ink: #59cf84;
  --warn: #f48c25;
  --warn-ink: #e2bc8d;
  --info: #4c96e6;
  --info-ink: #5ea1e8;
  --danger: #da7b6c;
  --chart-1: #5590cc;

  --elevation-raised: 0 1px 2px -1px hsl(0 0% 0% / 0.45), 0 4px 12px -2px hsl(0 0% 0% / 0.5);
  --elevation-overlay: 0 6px 16px -4px hsl(0 0% 0% / 0.55), 0 16px 40px -12px hsl(0 0% 0% / 0.65);

  /* Diagram strokes: Steel on Midnight */
  --dg-line: var(--ring);
  color-scheme: dark;
}

/* ============================================================
   Base
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + var(--space-4));
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--background);
  color: var(--foreground);
  font-family: var(--sans);
  font-size: var(--reading-lg);
  line-height: 1.5556;
  font-weight: 400;
  overflow-x: hidden;
}

a { color: var(--primary-ink); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 2px solid var(--ring); outline-offset: 2px; border-radius: var(--radius-sm); }

img, svg { max-width: 100%; }

.editorial h1, .editorial h2, .editorial h3, .editorial h4 {
  font-family: var(--editorial);
  font-weight: 400;
  font-style: normal;
  color: var(--foreground);
  letter-spacing: 0;
}

h1 { font-size: var(--editorial-h1); line-height: 1.1; }
h2 { font-size: var(--editorial-h2); line-height: 1.2; }
h3 { font-size: var(--editorial-h4); line-height: 1.4; }

p { margin-bottom: var(--flow-lead); }
p:last-child { margin-bottom: 0; }

strong { font-weight: 600; }

code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--muted);
  color: var(--foreground);
  padding: 0.1em 0.38em;
  border-radius: var(--radius-sm);
  overflow-wrap: anywhere;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -48px;
  z-index: 200;
  background: var(--primary);
  color: var(--primary-foreground);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-lg);
  font-weight: 500;
}
.skip-link:focus { top: var(--space-2); }

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container--wide {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.icon { display: inline-block; vertical-align: middle; flex-shrink: 0; }

/* Logos swap with the theme: Midnight on paper, Cream on Midnight */
.logo--on-dark { display: none; }
.dark .logo--on-light { display: none; }
.dark .logo--on-dark { display: block; }

/* ============================================================
   Navigation
   ============================================================ */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--background);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--elevation-raised);
}

.nav-inner {
  display: flex;
  align-items: center;
  height: var(--nav-h);
  padding: 0 var(--space-4);
  max-width: 1440px;
  margin: 0 auto;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
  margin-right: var(--space-3);
  padding: var(--space-3) var(--space-3) var(--space-3) 0;
}

/* The mark is 24px: clear space of half its height (12px) on every side */
.logo-mark { width: 24px; height: 24px; }

.nav-brand-text {
  font-size: var(--reading-sm);
  font-weight: 500;
  color: var(--foreground);
  white-space: nowrap;
}

.nav-links-wrap {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  width: 100%;
  padding-inline: 28px;
  overflow-x: auto;
  scrollbar-width: none;
  scroll-padding-inline: 32px;
}
.nav-links::-webkit-scrollbar { display: none; }

/* Soft edge fade: a solid ground colour mask, not a gradient behind text */
.nav-links-wrap::before,
.nav-links-wrap::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  width: 28px;
  pointer-events: none;
  z-index: 1;
  opacity: 0;
  background: var(--background);
  transition: opacity 0.15s;
}
.nav-links-wrap::before { left: 0; }
.nav-links-wrap::after { right: 0; }
.nav-links-wrap.show-left::before { opacity: 1; }
.nav-links-wrap.show-right::after { opacity: 1; }

.nav-scroll-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  border: none; background: none; padding: 0;
  cursor: pointer;
  z-index: 3;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s;
  color: var(--foreground);
}
.nav-scroll-arrow--left { left: 2px; }
.nav-scroll-arrow--right { right: 2px; }
.nav-scroll-arrow.visible { opacity: 1; pointer-events: auto; }

.nav-scroll-arrow-icon {
  width: 22px; height: 22px;
  border-radius: var(--radius-pill);
  display: flex; align-items: center; justify-content: center;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--elevation-raised);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted-foreground);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: var(--radius-lg);
  white-space: nowrap;
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover { color: var(--foreground); background: var(--accent); }
.nav-link.active { color: var(--foreground); background: var(--muted); }

.nav-num {
  font-family: var(--mono);
  font-size: var(--label);
  font-weight: 500;
  line-height: 1;
  padding: 3px 6px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--accent-foreground);
}
.nav-link.active .nav-num { background: var(--primary); color: var(--primary-foreground); }

.theme-toggle {
  background: none;
  border: 1px solid transparent;
  cursor: pointer;
  width: 40px; height: 40px;
  color: var(--muted-foreground);
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-lg);
  flex-shrink: 0;
  margin-left: var(--space-2);
  transition: color 0.2s, background 0.2s;
}
.theme-toggle:hover { color: var(--foreground); background: var(--accent); }
.theme-toggle svg {
  width: 18px; height: 18px;
  stroke: currentColor; fill: none;
  stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round;
}
#theme-icon-sun { display: none; }

/* ============================================================
   Hero (home)
   ============================================================ */

.hero {
  padding: calc(var(--nav-h) + var(--space-16)) 0 var(--space-12);
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.hero-tag {
  display: inline-block;
  background: var(--secondary);
  color: var(--secondary-foreground);
  font-size: var(--reading-xs);
  font-weight: 500;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-6);
}

.hero h1 {
  font-size: clamp(32px, 6vw, 52px);
  line-height: 1.1;
  max-width: 760px;
  margin: 0 auto var(--space-4);
}

.hero-subtitle {
  font-size: var(--reading-lg);
  color: var(--muted-foreground);
  margin-bottom: var(--space-6);
}

.hero-meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.hero-meta-item {
  font-size: var(--reading-sm);
  color: var(--foreground);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: var(--space-1) var(--space-3);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.hero-credit {
  font-size: var(--reading-sm);
  color: var(--muted-foreground);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--sans);
  font-size: var(--reading);
  font-weight: 500;
  padding: 10px 18px;
  border-radius: var(--radius-lg);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.btn-primary { background: var(--primary); color: var(--primary-foreground); }
.btn-primary:hover { background: var(--foreground); color: var(--background); text-decoration: none; }

.btn-outline { background: transparent; border-color: var(--border); color: var(--foreground); }
.btn-outline:hover { background: var(--accent); text-decoration: none; }

.btn-sm { font-size: var(--reading-sm); padding: 6px 12px; margin-top: var(--space-3); }

/* ============================================================
   Page header (modules, setup, resources)
   ============================================================ */

.page-header {
  padding: calc(var(--nav-h) + var(--space-12)) 0 var(--space-10);
  border-bottom: 1px solid var(--border);
}

.page-header-eyebrow {
  font-size: var(--reading-sm);
  font-weight: 500;
  color: var(--muted-foreground);
  margin-bottom: var(--space-3);
}
.eyebrow-num { color: var(--secondary-ink); }

.page-header h1 {
  font-size: clamp(30px, 5vw, var(--editorial-h1));
  margin-bottom: var(--space-4);
}

.page-header-desc {
  font-size: var(--reading-lg);
  color: var(--muted-foreground);
  max-width: 680px;
}

.page-header-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--reading-sm);
  font-weight: 500;
  color: var(--foreground);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: var(--space-1) var(--space-3);
}

/* ============================================================
   Sections
   ============================================================ */

.section {
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--border);
}
.section--lead { padding-bottom: var(--space-10); }
main > .section:last-of-type { border-bottom: none; }

.section-label {
  font-size: var(--reading-xs);
  font-weight: 500;
  color: var(--muted-foreground);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.section-label::after {
  content: "";
  flex: 0 0 48px;
  height: 1px;
  background: var(--border);
}

.section h2 { margin-bottom: var(--space-6); }

.section-intro {
  color: var(--muted-foreground);
  margin-bottom: var(--space-6);
}

.section p, .section li { overflow-wrap: break-word; }

.section > .container > p,
.section > .container > .table-wrap,
.section > .container > .content-list,
.section > .container > .numbered-list,
.section > .container > .code-block,
.section > .container > .code-pair,
.section > .container > .install-steps,
.section > .container > .capability-list,
.section > .container > .diagram-wrap,
.section > .container > .info-box,
.section > .container > .objectives { margin-bottom: var(--flow-space); }
.section > .container > :last-child { margin-bottom: 0; }

/* "Do it" lines */
.do-it-line { margin-top: var(--space-2); }
.do-it {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--reading-sm);
  font-weight: 500;
  color: var(--primary-foreground);
  background: var(--primary);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  margin-right: 6px;
  vertical-align: 2px;
}
.do-it .icon { fill: currentColor; stroke: none; }

.verify {
  font-family: var(--mono);
  font-size: 0.8em;
  font-weight: 500;
  color: var(--warn-ink);
  border: 1px dashed var(--warn-ink);
  border-radius: var(--radius-sm);
  padding: 0 4px;
  white-space: normal;
}

/* ============================================================
   Objectives
   ============================================================ */

.objectives {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.objectives-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--reading-sm);
  font-weight: 500;
  color: var(--primary-ink);
  margin-bottom: var(--space-3);
}

.objectives-text { color: var(--foreground); }
.objectives .content-list { margin-top: var(--space-2); }

/* ============================================================
   Lists
   ============================================================ */

.content-list, .numbered-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-left: 1.4em;
}
.content-list li::marker { color: var(--muted-foreground); }
.numbered-list li::marker { color: var(--muted-foreground); font-family: var(--mono); font-size: 0.9em; }

/* ============================================================
   Tables
   ============================================================ */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--card);
}

.simple-table, .lp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--reading-sm);
  line-height: 1.5;
}

.simple-table th, .lp-table th {
  text-align: left;
  font-weight: 500;
  font-size: var(--reading-xs);
  color: var(--muted-foreground);
  background: var(--sidebar);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.simple-table td, .lp-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  min-width: 120px;
}
.simple-table tbody tr:last-child td, .lp-table tbody tr:last-child td { border-bottom: none; }
.simple-table tbody tr:hover, .lp-table tbody tr:hover { background: var(--accent); }

.lp-table td:first-child { font-family: var(--mono); color: var(--muted-foreground); min-width: 0; }
.lp-table td:nth-child(3) { white-space: nowrap; min-width: 0; color: var(--muted-foreground); }
.lp-table td a { font-weight: 500; }

/* ============================================================
   Module grid
   ============================================================ */

.module-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.module-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  padding-right: var(--space-12);
  text-decoration: none;
  color: var(--foreground);
  transition: border-color 0.2s, background 0.2s;
}
.module-card:hover { border-color: var(--ring); background: var(--accent); text-decoration: none; }

.module-card-num { font-family: var(--mono); font-size: var(--reading-xs); color: var(--muted-foreground); }
.module-card-title { font-family: var(--editorial); font-size: var(--editorial-h4); line-height: 1.3; }
.module-card-desc { font-size: var(--reading-sm); color: var(--muted-foreground); }
.module-card-arrow {
  position: absolute;
  right: var(--space-6);
  top: var(--space-6);
  color: var(--primary-ink);
  transition: transform 0.2s;
}
.module-card:hover .module-card-arrow { transform: translateX(3px); }

/* ============================================================
   Info boxes (status colours always with an icon and a label)
   ============================================================ */

.info-box {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  font-size: var(--reading);
  line-height: 1.6;
}

.info-box-icon { display: flex; padding-top: 2px; }
.info-box-body { flex: 1; min-width: 0; }
.info-box-body p { margin-bottom: var(--space-2); }
.info-box-body .content-list { margin-top: var(--space-2); }
.info-box-label { font-weight: 600; }

.info-box--info .info-box-icon, .info-box--info .info-box-label { color: var(--info-ink); }
.info-box--success .info-box-icon, .info-box--success .info-box-label { color: var(--success-ink); }
.info-box--warn .info-box-icon, .info-box--warn .info-box-label { color: var(--warn-ink); }

/* ============================================================
   Code blocks and prompts
   ============================================================ */

.code-block {
  position: relative;
  background: var(--muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-4) var(--space-4) var(--space-4);
  margin: var(--space-4) 0;
}

.code-block pre {
  font-family: var(--mono);
  font-size: var(--code);
  line-height: 1.6;
  color: var(--foreground);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.code-block pre strong { font-weight: 600; }

.code-block-label {
  font-size: var(--reading-xs);
  font-weight: 500;
  color: var(--muted-foreground);
  margin-bottom: var(--space-2);
  padding-right: var(--space-10);
}

.code-block--prompt {
  background: var(--card);
  border: 1.5px solid var(--primary);
}
.code-block--prompt pre { font-family: var(--sans); font-size: var(--reading); line-height: 1.6; }
.code-block--prompt .code-block-label { color: var(--primary-ink); }

.code-copy-btn {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--muted-foreground);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.code-copy-btn:hover { color: var(--foreground); border-color: var(--ring); }
.code-copy-btn.copied { color: var(--success-ink); border-color: var(--success-ink); }

.code-copy-tip {
  position: absolute;
  bottom: calc(100% + 6px);
  right: 0;
  font-family: var(--sans);
  font-size: var(--reading-xs);
  font-weight: 500;
  white-space: nowrap;
  background: var(--popover);
  color: var(--foreground);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  box-shadow: var(--elevation-overlay);
  pointer-events: none;
}
.code-copy-tip:empty { display: none; }

.code-pair { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.code-pair .code-block { margin: 0; }

.install-step-desc .code-block, .info-box .code-block { margin: var(--space-3) 0; }

/* ============================================================
   Install steps (numbered procedures)
   ============================================================ */

.install-steps { display: flex; flex-direction: column; margin: var(--space-4) 0; }

.install-step { display: flex; gap: var(--space-4); padding-bottom: var(--space-6); }
.install-step:last-child { padding-bottom: 0; }

.install-step-line { display: flex; flex-direction: column; align-items: center; flex-shrink: 0; }

.install-step-dot {
  width: 28px; height: 28px;
  border-radius: var(--radius-pill);
  background: var(--primary);
  color: var(--primary-foreground);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono);
  font-size: var(--reading-sm);
  font-weight: 500;
  flex-shrink: 0;
}

.install-step-connector { width: 2px; flex: 1; background: var(--border); margin-top: var(--space-1); }
.install-step:last-child .install-step-connector { display: none; }

.install-step-body { flex: 1; min-width: 0; padding-top: 2px; }
.install-step-title { font-weight: 600; margin-bottom: var(--space-1); }
.install-step-desc p { margin-bottom: var(--space-2); }
.install-step-desc .content-list { margin: var(--space-2) 0; }

/* ============================================================
   Capability list (the Plan → Implement → Test → Repeat loop)
   ============================================================ */

.capability-list { display: flex; flex-direction: column; }

.capability-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
}
.capability-item:first-child { padding-top: 0; }
.capability-item:last-child { border-bottom: none; padding-bottom: 0; }

.capability-icon {
  width: 36px; height: 36px;
  background: var(--muted);
  color: var(--foreground);
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono);
  font-size: var(--reading-sm);
  font-weight: 500;
  flex-shrink: 0;
}

.capability-body h3 { margin-bottom: var(--space-1); display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }
.capability-body p { color: var(--foreground); margin-bottom: var(--space-1); }
.capability-done { font-size: var(--reading); color: var(--muted-foreground) !important; }
.capability-done-label { font-weight: 600; color: var(--foreground); }

.mode-tag {
  font-family: var(--sans);
  font-size: var(--reading-xs);
  font-weight: 500;
  color: var(--accent-foreground);
  background: var(--accent);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
}

/* ============================================================
   Topic items (resources)
   ============================================================ */

.topic-item { display: flex; gap: var(--space-4); padding: var(--space-6) 0; border-bottom: 1px solid var(--border); }
.topic-item:first-child { padding-top: 0; }
.topic-item:last-child { border-bottom: none; padding-bottom: 0; }
.topic-num { font-family: var(--mono); font-size: var(--reading-sm); color: var(--muted-foreground); min-width: 2rem; padding-top: 4px; }
.topic-content h3 { margin-bottom: var(--space-1); }
.topic-content p { color: var(--muted-foreground); margin: 0; }

/* ============================================================
   Diagrams
   ============================================================ */

.diagram-wrap {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  margin: var(--space-6) 0;
}
.diagram-wrap svg { display: block; width: 100%; height: auto; }
.diagram-wrap svg #patch_1 path { fill: var(--card) !important; }

/* ============================================================
   Page nav and footer
   ============================================================ */

.page-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-10) 0 var(--space-16);
}

.page-nav-link {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  flex: 1;
  max-width: 48%;
  padding: var(--space-4) var(--space-6);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  text-decoration: none;
  color: var(--foreground);
  transition: border-color 0.2s, background 0.2s;
}
.page-nav-link:hover { border-color: var(--ring); background: var(--accent); text-decoration: none; }
.page-nav-link--next { text-align: right; margin-left: auto; align-items: flex-end; }
.page-nav-label { display: inline-flex; align-items: center; gap: 6px; font-size: var(--reading-xs); font-weight: 500; color: var(--muted-foreground); }
.page-nav-title { font-family: var(--editorial); font-size: var(--editorial-h4); line-height: 1.3; }

.footer { border-top: 1px solid var(--border); padding: var(--space-12) 0; background: var(--sidebar); }
.footer-inner { display: flex; flex-direction: column; gap: var(--space-3); }
/* Wordmark 28px high: clear space of 14px around it */
.footer-logo { display: inline-block; align-self: flex-start; padding: 14px 14px 14px 0; }
.logo-wordmark { height: 28px; width: auto; }
.footer-text { font-size: var(--reading-sm); color: var(--muted-foreground); margin: 0; }
.footer-text--fine { font-size: var(--reading-xs); }

/* ============================================================
   Motion
   ============================================================ */

.fade-up { opacity: 0; transform: translateY(16px); animation: fadeUp 0.5s ease forwards; }
.fade-up:nth-child(1) { animation-delay: 0.04s; }
.fade-up:nth-child(2) { animation-delay: 0.08s; }
.fade-up:nth-child(3) { animation-delay: 0.12s; }
.fade-up:nth-child(4) { animation-delay: 0.16s; }
.fade-up:nth-child(5) { animation-delay: 0.2s; }
.fade-up:nth-child(6) { animation-delay: 0.24s; }
.fade-up:nth-child(n+7) { animation-delay: 0.28s; }

@keyframes fadeUp { to { opacity: 1; transform: translateY(0); } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fade-up { opacity: 1; transform: none; animation: none; }
  * { transition: none !important; }
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 768px) {
  body { font-size: var(--reading); line-height: 1.5; }
  .container, .container--wide { padding: 0 var(--space-4); }
  .nav-brand-text { display: none; }
  .nav-inner { padding: 0 var(--space-2) 0 var(--space-4); }
  .hero { padding: calc(var(--nav-h) + var(--space-10)) 0 var(--space-10); }
  .page-header { padding: calc(var(--nav-h) + var(--space-8)) 0 var(--space-8); }
  .section { padding: var(--space-10) 0; }
  h2 { font-size: var(--editorial-h3); }
  .module-grid { grid-template-columns: 1fr; }
  .code-pair { grid-template-columns: 1fr; }
  .simple-table td, .lp-table td { min-width: 140px; }
}

@media (max-width: 480px) {
  .page-nav { flex-direction: column; }
  .page-nav-link { max-width: 100%; }
  .page-nav-link--next { align-items: flex-end; }
  .objectives { padding: var(--space-4); }
  .info-box { padding: var(--space-3); }
}

/* Starter kit buttons */
.starter-buttons { display: flex; flex-wrap: wrap; gap: var(--space-3); margin: var(--space-4) 0; }
.starter-buttons .btn { margin: 0; }

/* ============================================================
   Home: illustration of the finished app
   ============================================================ */

.app-mock {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  max-width: 560px;
  margin: 0 auto;
}
.app-mock-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-2) var(--space-3);
  background: var(--sidebar);
  border-bottom: 1px solid var(--border);
}
.app-mock-bar > span { width: 10px; height: 10px; border-radius: var(--radius-pill); background: var(--border); }
.app-mock-url {
  flex: 1;
  margin-left: var(--space-2);
  font-family: var(--mono);
  font-size: var(--reading-xs);
  color: var(--muted-foreground);
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 2px var(--space-3);
}
.app-mock-body { padding: var(--space-6); display: flex; flex-direction: column; gap: var(--space-3); }
.app-mock-title { font-family: var(--sans); font-size: var(--editorial-h4); font-weight: 600; }
.app-mock-label { display: block; font-size: var(--reading-xs); color: var(--muted-foreground); }
.app-mock-input {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--reading-sm);
  border: 1px solid var(--input);
  border-radius: var(--radius-md);
  padding: 6px var(--space-3);
  background: var(--background);
  max-width: 200px;
}
.app-mock-company { font-size: var(--reading-lg); font-weight: 600; margin-top: var(--space-2); }
.app-mock-sub { font-size: var(--reading-sm); color: var(--muted-foreground); margin-top: calc(-1 * var(--space-2)); }
.app-mock-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-2); }
.app-mock-metric { border: 1px solid var(--border); border-radius: var(--radius-lg); padding: var(--space-2) var(--space-3); }
.app-mock-value { display: block; font-family: var(--mono); font-size: var(--reading); font-weight: 500; }
.app-mock-chart svg { width: 100%; height: 110px; display: block; margin-top: var(--space-1); }
.app-mock-line { fill: none; stroke: var(--chart-1); stroke-width: 2; vector-effect: non-scaling-stroke; stroke-linejoin: round; }
.app-mock-axis { stroke: var(--border); stroke-width: 1; vector-effect: non-scaling-stroke; }
.app-mock-calc { border-top: 1px solid var(--border); padding-top: var(--space-3); font-size: var(--reading-sm); }
.app-mock-calc p { margin: var(--space-2) 0 0; }
.app-mock figcaption {
  font-size: var(--reading-xs);
  color: var(--muted-foreground);
  padding: var(--space-3) var(--space-6);
  border-top: 1px solid var(--border);
  background: var(--sidebar);
}
@media (max-width: 480px) {
  .app-mock-body { padding: var(--space-4); }
  .app-mock-metrics { grid-template-columns: 1fr 1fr; }
  .app-mock-value { font-size: var(--reading-sm); }
}