@import url('/assets/fonts/fonts.css');
@import url('/assets/design.css');

:root {
  --paper: var(--bg);
  --grid-minor: rgba(28, 40, 90, 0.035);
  --grid-major: rgba(28, 40, 90, 0.075);
}
[data-theme="dark"] {
  --grid-minor: rgba(150, 175, 255, 0.03);
  --grid-major: rgba(150, 175, 255, 0.065);
}

/* The manual uses the app's workbench surfaces, controls and graph paper. */
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid-minor) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-minor) 1px, transparent 1px);
  background-size: 30px 30px, 30px 30px, 6px 6px, 6px 6px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
button {
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  min-height: 48px;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
}
button:hover { background: var(--surface-3); }
button:disabled { opacity: 0.9; cursor: default; }
.top {
  position: sticky;
  top: var(--standalone-top, 0px);
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 16px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--line);
}
/* One thin spectrum line under the top bar, as in the app. */
.top::after { content: ''; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--spectrum); opacity: 0.85; pointer-events: none; }
.manual-brand, .back-link, .top-actions { display: flex; align-items: center; gap: 10px; }
.manual-brand { min-width: 0; }
.back-link { min-height: 48px; color: var(--ink); text-decoration: none; }
.back-link img { flex: none; }
.back-link span { font-family: var(--font-display); font-size: 1.02rem; font-weight: 600; letter-spacing: -0.03em; }
.manual-badge { padding: 2px 7px; border: 1px solid var(--accent); border-radius: 999px; color: var(--accent); font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.06em; text-transform: uppercase; }
.top-actions { gap: 4px; flex: none; }
#contents-button { border-color: transparent; background: transparent; color: var(--ink-2); }
#contents-button:hover { background: var(--surface-3); color: var(--ink); }
.top .theme-toggle button { width: 48px; height: 48px; padding: 0; }
main { max-width: 1120px; margin: 0 auto; padding: 24px 20px 40px; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 500; line-height: 1.3; letter-spacing: -0.02em; }
h1 { font-size: clamp(1.5rem, 4vw, 1.95rem); margin: 10px 0; }
h2 { font-size: 1.18rem; margin: 32px 0 10px; }
h3 { font-size: 0.98rem; margin: 24px 0 8px; }
.anchor-alias, h2[id], h3[id], details[id] { scroll-margin-top: calc(var(--standalone-top, 0px) + 84px); }
.manual-intro { background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-1); padding: 24px 28px; }
.manual-intro .lead { max-width: 65ch; color: var(--ink-2); margin: 0; font-size: 1.05rem; }
.eyebrow { color: var(--ink-3); font-family: var(--font-mono); font-size: 0.7rem; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; margin: 0 0 8px; }
.manual-intro .eyebrow { color: var(--accent); }
.manual-intro .eyebrow::before { content: ''; display: inline-block; width: 6px; height: 6px; margin-right: 8px; border-radius: 50%; background: currentColor; vertical-align: 1px; }
.intro-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 18px 0; }
.intro-actions a { min-height: 48px; display: inline-flex; align-items: center; padding: 9px 16px; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); text-decoration: none; font-weight: 600; font-size: 0.9rem; background: var(--surface); }
.intro-actions a:hover { background: var(--surface-3); }
.intro-actions .primary-link { border-color: transparent; color: var(--accent-ink); background: var(--accent); }
.intro-actions .primary-link:hover { background: var(--accent-hover); }
.screen-note { font-size: 0.85rem; color: var(--ink-2); margin-bottom: 0; }
.section-intro { color: var(--ink-2); max-width: 65ch; }
.step-index { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin: 20px 0 28px; }
.step-index a { display: flex; align-items: center; gap: 10px; min-height: 52px; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); background: var(--surface); padding: 8px 12px; text-decoration: none; color: var(--ink-2); font-size: 0.86rem; box-shadow: var(--shadow-1); }
.step-index a:hover { background: var(--accent-soft); border-color: var(--accent); color: var(--ink); }
.step-index span { font-family: var(--font-mono); color: var(--accent); }
.step-index a:hover span { color: var(--ink); }
.walkthrough-step { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-1); padding: 22px; margin-top: 24px; }
.walkthrough-step > h3 { font-size: 1.22rem; margin: 0 0 18px; }
.walkthrough-step > h3[id] { width: fit-content; scroll-margin-top: calc(var(--standalone-top, 0px) + 124px); }
.walkthrough-step > h3:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; border-radius: 2px; }
.step-layout { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); align-items: start; gap: 24px; border-top: 1px solid var(--line); padding-top: 20px; }
.actions { padding-left: 1.35em; margin: 0; }
.actions li { padding: 0 0 12px 4px; }
.actions li::marker { font-family: var(--font-mono); color: var(--accent); font-size: 0.85em; }
.checkpoint { padding: 14px 16px; margin-top: 12px; background: var(--accent-soft); border: 1px solid var(--accent-soft); border-radius: var(--radius-sm); }
.checkpoint > strong { display: block; color: var(--accent); margin-bottom: 7px; font-family: var(--font-mono); font-size: 0.68rem; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; }
.checkpoint p { margin: 0; }
.screenshot { margin: 22px 0 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.step-layout > .screenshot { margin: 0; }
.screenshot-link { display: block; color: var(--ink-2); text-decoration: none; }
.screenshot-link img { display: block; max-width: 100%; height: auto; margin: 0 auto; }
.screenshot-open { display: flex; align-items: center; justify-content: flex-end; gap: 6px; min-height: 48px; padding: 10px 16px; border-top: 1px solid var(--line); font-size: 0.8rem; color: var(--accent); font-weight: 600; background: var(--surface-2); }
.screenshot-link:hover .screenshot-open { background: var(--surface-3); }
.screenshot-link:focus-visible { outline-offset: -4px; }
.screenshot-dark { display: none; }
[data-theme="dark"] .screenshot-light { display: none; }
[data-theme="dark"] .screenshot-dark { display: block; }
.screenshot figcaption { padding: 12px 16px; border-top: 1px solid var(--line); font-size: 0.88rem; color: var(--ink-2); background: var(--surface-2); }
.screenshot figcaption strong { color: var(--ink); }
.step-nav { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 16px; margin: 20px 0 0; padding-top: 14px; border-top: 1px solid var(--line); }
.step-nav a { min-height: 48px; display: inline-flex; align-items: center; max-width: 100%; font-size: 0.88rem; }
.extra, .reference-item { border: 1px solid var(--line); border-radius: var(--radius-sm); margin: 18px 0; background: var(--surface-2); }
.extra summary, .reference-item summary { padding: 12px 16px; min-height: 48px; font-weight: 600; cursor: pointer; font-size: 0.93rem; }
summary::marker { color: var(--accent); }
.extra-body, .reference-body { padding: 0 18px 18px; }
.extra-body > :first-child, .reference-body > :first-child { margin-top: 4px; }
.extra-body .screenshot, .reference-body .screenshot { max-width: 820px; margin: 18px auto; }
.reference { margin-top: 36px; }
.reference-body { max-width: 850px; }
.reference-body h3 { margin-top: 20px; }
code, kbd { font-family: var(--font-mono); font-size: 0.85em; background: var(--surface-3); padding: 1px 5px; border-radius: 5px; }
table { width: 100%; border-collapse: collapse; margin: 12px 0; background: var(--surface); }
th, td { padding: 8px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: var(--surface-3); font-weight: 600; }
.column-check { max-width: 620px; }
.column-check td:last-child { white-space: nowrap; font-family: var(--font-mono); font-size: 0.85rem; }
.note { background: var(--accent-soft); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 10px 14px; margin: 14px 0; }
.example { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 6px; margin: 12px 0; font-family: var(--font-mono); font-size: 0.85rem; text-align: center; }
.example span { padding: 6px 4px; border-radius: 5px; background: var(--surface); border: 1px solid var(--line); }
.example .role { font-weight: 600; color: var(--accent); }
.math-scroll, .reference-table { max-width: 100%; overflow-x: auto; overscroll-behavior-x: contain; }
.math-scroll mjx-container[display="true"] { text-align: left !important; }
footer { border-top: 1px solid var(--line); background: var(--surface-2); color: var(--ink-2); font-family: var(--font-mono); font-size: 0.72rem; text-align: center; padding: 16px 20px; }
footer a { color: var(--ink-2); }
.dialog-open { overflow: hidden; }
dialog { color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 0; box-shadow: var(--shadow-2); }
dialog::backdrop { background: #000a; }
.dialog-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 16px; background: var(--surface-2); border-bottom: 1px solid var(--line); }
.dialog-head h2 { margin: 0; font-size: 1.05rem; }
.contents-dialog { width: min(680px, calc(100% - 24px)); max-height: calc(100dvh - var(--standalone-top, 0px) - 32px); overflow: auto; }
.contents-dialog .dialog-head { position: sticky; top: 0; z-index: 1; }
.contents-dialog nav { padding: 0 22px 20px; }
.contents-dialog h3 { margin: 18px 0 6px; color: var(--ink-3); font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; }
.contents-dialog ol, .contents-dialog ul { margin: 0; padding-left: 1.4em; }
.contents-dialog li a { display: block; padding: 10px 4px; min-height: 48px; }
.image-dialog { width: min(1200px, calc(100% - 24px)); height: min(900px, calc(100dvh - var(--standalone-top, 0px) - 24px)); max-height: calc(100dvh - var(--standalone-top, 0px) - 24px); }
.image-dialog[open] { display: flex; flex-direction: column; }
dialog { inset: var(--standalone-top, 0px) 0 0; }
.zoom-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; padding: 10px 12px 0; }
#zoom-in, #zoom-out { min-width: 48px; font-size: 1.2rem; }
#zoom-level { min-width: 4ch; text-align: center; font-family: var(--font-mono); font-size: 0.85rem; color: var(--ink-2); }
.zoom-hint { margin: 8px 12px 10px; font-size: 0.82rem; color: var(--ink-2); }
.image-scroll { flex: 1; min-height: 0; overflow: auto; overscroll-behavior: contain; border-top: 1px solid var(--line); background: var(--paper); }
.image-scroll img { display: block; max-width: none; height: auto; margin: 0 auto; }
@media (max-width: 850px) {
  .step-layout { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .step-index { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .step-layout > .screenshot { width: 100%; max-width: 650px; justify-self: center; }
}
@media (max-width: 520px) {
  .top { padding: 8px 12px; gap: 8px; }
  .manual-brand { gap: 6px; }
  .manual-badge { display: none; }
  .back-link { gap: 7px; }
  .back-link img { width: 26px; height: 26px; }
  .back-link span { font-size: 1.12rem; }
  main { padding: 16px 12px 28px; }
  .manual-intro { padding: 20px; }
  .walkthrough-step { padding: 18px 14px; }
  .step-index a { font-size: 0.8rem; padding: 8px; }
  .walkthrough-step > h3 { font-size: 1.12rem; }
  .step-nav a:last-child { margin-left: auto; text-align: right; }
  .column-check th, .column-check td { padding: 8px 6px; font-size: 0.85rem; }
  .example { font-size: 0.75rem; }
}