/* Image Bench tutorial. The look of the landing page (landing/styles.css): light page, orange accent
   (ACCENT_COLORS.orange of the app: #f97316, deep #c2410c), screenshots in dark frames. Static, no script. */

:root {
  --page: #fbfaf8;
  --band: #fff6ee;
  --band-line: #fbe3cf;
  --grey-band: #f5f3f0;
  --line: #ece8e4;
  --card-line: #e7e5e4;
  --text: #18181b;
  --text2: #44403c;
  --muted: #57534e;
  --logo: #78716c;
  --header: rgba(251, 250, 248, 0.86);
  --accent: #f97316;
  --accent-text: #ea580c;
  --accent-deep: #c2410c;
  --ink-on-accent: #1a0b00;
  --dark: #18181b;
  --dark-line: #27272a;
  --warn-bg: #f5f3f0;
  --warn-line: #d6d3d1;
  --shadow-window: 0 30px 60px -24px rgba(68, 30, 6, 0.45), 0 0 0 1px var(--dark-line);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family: 'Figtree', system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; }
a { color: var(--accent-deep); }
a:hover { color: #9a3412; }
h1, h2, h3, h4, p { margin: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.disp { font-family: 'Bricolage Grotesque', 'Figtree', sans-serif; letter-spacing: -0.02em; }
.mono { font-family: 'JetBrains Mono', ui-monospace, monospace; }
.wrap { max-width: 1240px; margin: 0 auto; padding: 0 32px; }
.accent { color: var(--accent-text); }
.muted { color: var(--muted); }

code {
  font: 0.86em 'JetBrains Mono', ui-monospace, monospace;
  padding: 1px 6px; border-radius: 6px;
  background: #f3efeb; color: #3f3a36; white-space: nowrap;
}
kbd {
  display: inline-block; min-width: 1.7em; padding: 0 6px; text-align: center;
  font: 600 0.8em/1.75 'JetBrains Mono', ui-monospace, monospace;
  border-radius: 6px; background: #ffffff; color: var(--text);
  box-shadow: inset 0 0 0 1px #d6d3d1, 0 1.5px 0 #d6d3d1;
}

.kicker {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 13px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent-deep);
}

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  min-height: 44px; padding: 0 16px; border-radius: 12px;
  font: 600 15px 'Figtree', sans-serif; text-decoration: none;
}
.btn-sec { color: var(--text); box-shadow: inset 0 0 0 1.5px #d4d4d8; }
.btn-sec:hover { color: var(--text); box-shadow: inset 0 0 0 1.5px var(--accent); }

/* ---------------------------------------------------------------- header */

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: var(--header); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line);
}
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; }
.brand:hover { color: var(--text); }
.brand .disp { font-size: 20px; font-weight: 700; }
.brand-sub { font: 600 13px 'JetBrains Mono', ui-monospace, monospace; color: var(--accent-deep);
  padding: 2px 8px; border-radius: 999px; background: var(--band); box-shadow: inset 0 0 0 1px var(--band-line); }
.header-links { display: flex; align-items: center; gap: 18px; }
.navlink { color: var(--text2); text-decoration: none; font-weight: 500; font-size: 15px; padding: 10px 4px; }
.navlink:hover { color: var(--accent-deep); }

/* ---------------------------------------------------------------- hero */

.hero { padding: 80px 0 72px; background: var(--band); border-bottom: 1px solid var(--band-line); }
.hero-row { display: flex; flex-wrap: wrap; gap: 40px 64px; align-items: flex-end; }
.hero-text { flex: 1 1 560px; min-width: 0; display: flex; flex-direction: column; gap: 22px; }
.hero h1 { font-size: clamp(36px, 5vw, 64px); line-height: 1.02; font-weight: 800; }
.hero-lead { font-size: 20px; line-height: 1.55; color: var(--text2); max-width: 36em; }
.legend-card {
  flex: 0 1 360px; min-width: 0; display: flex; flex-direction: column; gap: 12px;
  padding: 22px 24px; border-radius: 16px; background: #ffffff; box-shadow: inset 0 0 0 1px var(--band-line);
}
.legend-card h2 { font: 600 13px 'JetBrains Mono', ui-monospace, monospace; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--muted); }
.legend-row { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; line-height: 1.5; color: var(--text2); }
.legend-row .tag { flex: none; }

/* ---------------------------------------------------------------- layout: contents + chapters */

.layout { display: flex; flex-wrap: wrap; gap: 56px; align-items: flex-start; padding-top: 64px; padding-bottom: 120px; }
.toc {
  flex: 1 1 250px; max-width: 280px; min-width: 0;
  position: sticky; top: 92px; max-height: calc(100vh - 110px); overflow-y: auto;
  padding-right: 6px;
}
.toc h2 { font: 600 13px 'JetBrains Mono', ui-monospace, monospace; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.toc ol { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.toc a {
  display: flex; gap: 12px; align-items: baseline; padding: 7px 10px; border-radius: 10px;
  color: var(--text2); text-decoration: none; font-size: 15px; line-height: 1.35;
}
.toc a:hover { background: var(--band); color: var(--accent-deep); }
.toc .n { flex: none; width: 1.6em; font: 600 13px 'JetBrains Mono', ui-monospace, monospace; color: var(--accent); }

.content { flex: 999 1 640px; min-width: 0; display: flex; flex-direction: column; gap: 96px; }

/* ---------------------------------------------------------------- chapter */

.chapter { display: flex; flex-direction: column; gap: 28px; }
/* the chapter head opens with a full-width orange rule; under it the chapter label and the count, then a large title */
.chapter-head { display: flex; flex-direction: column; gap: 16px; }
/* the rule and the chapter label hanging from it are one shape: the label is a tab with its top edge on the rule */
.chapter-head::before { content: ""; height: 4px; margin-bottom: -16px; border-radius: 2px 2px 0 0; background: var(--accent-text); }
.chapter-kicker { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: 4px 16px; }
.chapter-kicker > span:first-child {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 7px 16px 8px; border-radius: 0 0 10px 10px;
  background: var(--accent-text); color: #ffffff; font-weight: 700;
}
.chapter-count { padding-top: 7px; color: var(--logo); }
.chapter h2 { font-size: clamp(34px, 4vw, 52px); line-height: 1.04; font-weight: 800; letter-spacing: -0.025em; }
.scenario { font-size: 19px; line-height: 1.6; color: var(--text2); max-width: 44em; }

.topic { display: flex; flex-direction: column; gap: 14px; }
.topic h3 { font-family: 'Bricolage Grotesque', 'Figtree', sans-serif; font-size: 24px; font-weight: 700;
  letter-spacing: -0.01em; line-height: 1.25; }
.topic p, .topic li { color: var(--text2); max-width: 46em; }
.topic ul, .topic ol { margin: 0; padding-left: 1.3em; display: flex; flex-direction: column; gap: 8px; }

/* numbered steps */
ol.steps { list-style: none; padding: 0; counter-reset: step; gap: 12px; }
ol.steps > li { position: relative; padding-left: 44px; counter-increment: step; }
ol.steps > li::before {
  content: counter(step); position: absolute; left: 0; top: 1px;
  width: 28px; height: 28px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font: 600 13px 'JetBrains Mono', ui-monospace, monospace;
  background: var(--accent); color: var(--ink-on-accent);
}

/* callouts */
.callout { display: flex; flex-direction: column; gap: 8px; padding: 18px 22px; border-radius: 14px; max-width: 48em; }
.callout p, .callout li { color: var(--text2); }
.callout ul { margin: 0; padding-left: 1.2em; display: flex; flex-direction: column; gap: 6px; }
.callout-title { display: flex; align-items: center; gap: 8px; font: 600 13px 'JetBrains Mono', ui-monospace, monospace;
  letter-spacing: 0.08em; text-transform: uppercase; }
.callout svg { flex: none; }
.non-obvious { background: var(--band); box-shadow: inset 0 0 0 1px var(--band-line); }
.non-obvious .callout-title { color: var(--accent-deep); }
.fix { background: var(--warn-bg); box-shadow: inset 0 0 0 1px var(--warn-line); }
.fix .callout-title { color: #44403c; }

/* an app button drawn in the text: dark like the app's toolbar */
.ui {
  display: inline-flex; align-items: center; justify-content: center; gap: 4px;
  min-width: 1.7em; height: 1.5em; padding: 0 4px; border-radius: 6px; vertical-align: -0.3em;
  background: #27272a; color: #e4e4e7; font-size: 0.85em; font-weight: 600; white-space: nowrap;
}
.ui-wide { padding: 0 8px 0 6px; }
/* key, icon and the first text line share one 21px line box (15px text at line-height 1.4), so they stay aligned when the text wraps */
.key .ui { flex: none; height: 21px; vertical-align: 0; }

/* replicas of app controls (Generate toolbar buttons, status pills) on the app's dark ground, colors of base.css */
.app-demo {
  display: flex; flex-direction: column; gap: 10px; max-width: 48em;
  padding: 16px 18px; border-radius: 14px; background: #111317; box-shadow: 0 0 0 1px #27272a;
  font: 12.5px/1.4 'Figtree', system-ui, sans-serif;
}
.app-row { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 16px; }
.app-note { color: #a7aeb8; font-size: 13px; }
.app-note kbd { font-size: 0.9em; }
.app-btns { display: inline-flex; gap: 6px; min-width: 190px; }
.app-btn {
  display: inline-flex; align-items: center; gap: 6px; height: 26px; padding: 0 10px;
  border: 1px solid transparent; border-radius: 5px; font-weight: 500; color: #a7aeb8;
}
.app-btn.primary { background: #f97316; color: #1a0b00; font-weight: 600; }
.app-btn.stop { background: #e5484d; color: #ffffff; font-weight: 600; }
.app-btn.outline { border-color: #2a2e35; background: #1d2025; color: #e3e6ea; }
.app-btn.off { opacity: 0.45; }
/* Generate / Stop / Restart is one button that keeps the width of its widest label, as .btn.swap does in the app */
.app-btns > .app-btn:first-child { width: 98px; justify-content: center; }
.pill {
  display: inline-flex; align-items: center; gap: 7px; height: 22px; padding: 0 10px;
  border: 1px solid rgba(249, 115, 22, 0.4); border-radius: 11px;
  background: rgba(249, 115, 22, 0.13); color: #f97316; font-size: 11.5px; white-space: nowrap;
}
.pill.waiting { border-color: #3a3f48; background: #252930; color: #a7aeb8; }
.pill.stalled { padding-right: 3px; border-color: rgba(240, 164, 49, 0.45); background: rgba(240, 164, 49, 0.12); color: #f0a431; }
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.pill-action { display: inline-flex; align-items: center; justify-content: center; width: 16px; height: 16px; border-radius: 50%;
  background: rgba(240, 164, 49, 0.2); }
.app-demo .app-row > .pill { min-width: 190px; justify-content: flex-start; }
@media (max-width: 640px) { .app-btns, .app-demo .app-row > .pill { min-width: 0; } }

/* host tags */
.tag {
  display: inline-block; padding: 1px 8px; border-radius: 999px; vertical-align: 1px;
  font: 600 12px/1.6 'JetBrains Mono', ui-monospace, monospace;
}
.tag-webui { background: #e8efff; color: #1e3a8a; }
.tag-comfy { background: #ecfdf3; color: #14532d; }

/* screenshots */
figure { margin: 0; display: flex; flex-direction: column; gap: 10px; }
figcaption { font-size: 14px; line-height: 1.5; color: var(--muted); max-width: 48em; }
.window { border-radius: 14px; background: var(--dark); box-shadow: var(--shadow-window); overflow: hidden; }
.window > img { display: block; width: 100%; height: auto; }
.window-bar {
  height: 30px; display: flex; align-items: center; gap: 7px; padding: 0 12px;
  background: #232326; border-bottom: 1px solid #2e2e33;
}
.window-bar > i { width: 10px; height: 10px; border-radius: 50%; background: var(--muted); }
.window-title { margin-left: 12px; font: 12px 'JetBrains Mono', ui-monospace, monospace; color: #a1a1aa;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.shot-small { max-width: 420px; }
.shot-mid { max-width: 820px; }
.shot-small img, .shot-mid img { border-radius: 12px; box-shadow: 0 0 0 1px var(--card-line), 0 12px 28px -16px rgba(68, 30, 6, 0.35); }

/* side by side: text and a small picture */
.pair { display: flex; flex-wrap: wrap; gap: 24px 36px; align-items: flex-start; }
.pair > .topic { flex: 1 1 360px; min-width: 0; }
.pair > figure { flex: 0 1 380px; min-width: 0; }
.pair > p { flex: 1 1 360px; min-width: 0; }
.pair > figure.shot-narrow { flex-basis: 300px; }
/* a screenshot with numbered markers and lines to detail views, drawn as one SVG so everything scales together */
.annotated svg { display: block; width: 100%; height: auto; overflow: visible; }
.ann-link rect, .ann-link path { fill: none; stroke: var(--accent-text); stroke-width: 2.5; stroke-linecap: round;
  paint-order: stroke; filter: drop-shadow(0 0 1.5px rgba(255, 255, 255, 0.9)); }
.ann-markers circle { fill: var(--accent-text); stroke: #ffffff; stroke-width: 2.5; }
.ann-markers text { fill: #ffffff; font: 700 14px 'JetBrains Mono', ui-monospace, monospace;
  text-anchor: middle; dominant-baseline: central; }
/* the list that explains the markers: its numbers look like the markers */
ol.marker-list > li::before { background: var(--accent-text); color: #ffffff; box-shadow: 0 0 0 2px #ffffff, 0 0 0 3px var(--card-line); }

/* the editor round-trip (chapter 11): an emulated editor and a small Image Bench window in one SVG */
.roundtrip svg { display: block; width: 100%; height: auto; overflow: visible;
  filter: drop-shadow(0 18px 24px rgba(68, 30, 6, 0.28)); }
.rt-ps { fill: #31a8ff; font: 700 9px 'Figtree', system-ui, sans-serif; text-anchor: middle; dominant-baseline: central; }
.rt-layers-tab { fill: #e5e5e5; font: 600 10px 'Figtree', system-ui, sans-serif; }
.rt-layer { fill: #d4d4d4; font: 500 10px 'Figtree', system-ui, sans-serif; dominant-baseline: central; }
.rt-layer-new { fill: #ffffff; font-weight: 700; }
.rt-title { fill: #a1a1aa; font: 10px 'JetBrains Mono', ui-monospace, monospace; dominant-baseline: central; }
.rt-mark { fill: none; stroke: var(--accent); stroke-width: 2.5; }
.rt-rim path { fill: rgba(24, 24, 27, 0.86); stroke: rgba(255, 255, 255, 0.28); stroke-width: 1; }
.rt-rim path.rt-rim-on { fill: var(--accent); stroke: #ffffff; }
.rt-ps-on { fill: #ffffff; font-size: 11px; }
.rt-doc { fill: #a3a3a3; font: 500 8.5px 'Figtree', system-ui, sans-serif; dominant-baseline: central; }
.rt-doc-new { fill: #ffffff; font-weight: 700; }
.rt-mark-back { fill: none; stroke: #ffffff; stroke-width: 2; }
.rt-same { fill: none; stroke: #a8a29e; stroke-width: 1.5; stroke-dasharray: 4 4; }
.rt-layers-icon { fill: none; stroke: #ffffff; stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; }
.rt-key { fill: #ffffff; stroke: var(--card-line); stroke-width: 1.5; }
.rt-key-text { fill: var(--text); font: 600 11px 'JetBrains Mono', ui-monospace, monospace; text-anchor: middle; dominant-baseline: central; }
.rt-held { fill: var(--muted); font: 600 12px 'JetBrains Mono', ui-monospace, monospace; dominant-baseline: central; }
.rt-label-small { font-size: 11px; fill: var(--muted); }
.rt-hole { fill: #ffffff; font: 600 8.5px 'Figtree', system-ui, sans-serif; text-anchor: middle; dominant-baseline: central; }
.rt-to { fill: none; stroke: var(--accent); stroke-width: 3.5; stroke-linecap: round; }
.rt-back { fill: none; stroke: #18181b; stroke-width: 3.5; stroke-linecap: round; }
.rt-back-halo { fill: none; stroke: #ffffff; stroke-width: 6.5; stroke-linecap: round; }
.rt-label { font: 600 12px 'JetBrains Mono', ui-monospace, monospace; text-anchor: middle; }
.rt-label-to { fill: var(--accent-deep); }
.rt-label-back { fill: #27272a; }
.rt-ants { animation: rt-ants 1s linear infinite; }
@keyframes rt-ants { to { stroke-dashoffset: -12; } }
@media (prefers-reduced-motion: reduce) { .rt-ants { animation: none; } }

/* two screenshots side by side, stacked on narrow screens */
.shots-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
@media (max-width: 640px) { .shots-row { grid-template-columns: minmax(0, 1fr); } }
/* a wide strip of the app (the filmstrip), shown at the column width */
.shot-wide img { display: block; width: 100%; height: auto; border-radius: 12px;
  box-shadow: 0 0 0 1px var(--card-line), 0 12px 28px -16px rgba(68, 30, 6, 0.35); }

/* tables */
.table-box { overflow-x: auto; border-radius: 14px; box-shadow: inset 0 0 0 1px var(--card-line); background: #ffffff; max-width: 100%; }
table { border-collapse: collapse; width: 100%; font-size: 15px; line-height: 1.5; }
th, td { text-align: left; vertical-align: top; padding: 10px 16px; border-bottom: 1px solid var(--line); }
tr:last-child td { border-bottom: 0; }
th { font: 600 12px 'JetBrains Mono', ui-monospace, monospace; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); background: #faf8f6; }
td { color: var(--text2); }
td:first-child { white-space: nowrap; }
.yes { color: #15803d; font-weight: 600; }
.no { color: var(--muted); }

/* a row of key / meaning cards */
.keys { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; }
.key { display: flex; flex-wrap: wrap; gap: 4px; align-items: flex-start; padding: 10px 14px; border-radius: 12px;
  background: #ffffff; box-shadow: inset 0 0 0 1px var(--card-line); font-size: 15px; color: var(--text2); line-height: 1.4; }
.key kbd { flex: none; height: 21px; }
/* the description goes under a long key combination (Ctrl+Shift+Backspace) instead of out of the card */
.key > span { flex: 1 1 9em; min-width: 0; margin-left: 8px; }

/* ---------------------------------------------------------------- footer */

.site-footer { border-top: 1px solid var(--line); padding: 36px 0 48px; color: var(--muted); font-size: 15px; }
.footer-row { display: flex; flex-wrap: wrap; gap: 12px 28px; justify-content: space-between; }

/* ---------------------------------------------------------------- narrow screens */

@media (max-width: 920px) {
  .toc { position: static; max-width: none; max-height: none; flex-basis: 100%; }
  .layout { gap: 40px; padding-top: 40px; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .header-links .navlink { display: none; }
  .hero { padding: 48px 0 44px; }
  .hero-lead, .scenario { font-size: 17px; }
  .content { gap: 72px; }
  td:first-child { white-space: normal; }
  code { white-space: normal; }
}