/* ==========================================================================
   LaTeX Studio — landing page
   Two themes driven by `html[data-theme]`, no external font requests.
   ========================================================================== */

:root {
  --font-display: ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --font-ui: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --container: 1220px;
  --r-sm: 7px;
  --r-md: 11px;
  --r-lg: 16px;
  --ease: cubic-bezier(.2, .6, .2, 1);
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #f7f6f2;
  --bg-1: #f2f1ea;
  --surface: #ffffff;
  --surface-2: #fbfaf6;
  --ink: #1d2320;
  --ink-dim: #5b645f;
  --ink-faint: #838b86;
  --line: #e2e1d8;
  --line-2: #d2d2c8;
  --accent: #37695f;
  --accent-2: #9a713f;
  --accent-soft: rgba(55, 105, 95, .1);
  --on-accent: #ffffff;
  --code-bg: #f4f4ef;
  --shadow: 0 20px 46px -30px rgba(24, 32, 28, .4);
  --good: #1f7a4d;
  --warn: #9a5b00;
  --err: #bd3a34;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #141718;
  --bg-1: #181c1d;
  --surface: #1c2122;
  --surface-2: #212728;
  --ink: #e9eae5;
  --ink-dim: #a7afac;
  --ink-faint: #78817e;
  --line: #282e2f;
  --line-2: #363e3f;
  --accent: #8ab8ad;
  --accent-2: #c8a879;
  --accent-soft: rgba(138, 184, 173, .12);
  --on-accent: #0f1615;
  --code-bg: #191e1f;
  --shadow: 0 24px 50px -32px rgba(0, 0, 0, .75);
  --good: #5cc98d;
  --warn: #e0b060;
  --err: #e58a83;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 96px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
img { max-width: 100%; display: block; }
code, kbd, pre { font-family: var(--font-mono); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

h1, h2, h3 { font-weight: 400; letter-spacing: -.03em; margin: 0; font-family: var(--font-display); }
p { margin: 0; }

.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 200;
  padding: 10px 16px; border-radius: var(--r-sm);
  background: var(--ink); color: var(--bg);
  transition: top .18s var(--ease);
}
.skip-link:focus { top: 12px; }

.site-shell { max-width: var(--container); margin: 0 auto; padding: 0 32px; }

/* ------------------------------------------------------------------ Header */

.site-header {
  position: sticky; top: 0; z-index: 60;
  display: flex; align-items: center; gap: 26px;
  height: 74px;
  margin: 0 -32px; padding: 0 32px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px) saturate(140%);
}
.site-header.scrolled { border-bottom-color: var(--line-2); }

.wordmark { display: flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 600; letter-spacing: -.03em; }
.mark {
  display: grid; place-items: center; width: 28px; height: 28px;
  border: 1px solid var(--line-2); border-radius: 8px;
  color: var(--accent); font: 500 14px var(--font-mono);
}
.version-badge {
  padding: 2px 7px; border: 1px solid var(--line); border-radius: 99px;
  color: var(--ink-faint); font: 500 10px var(--font-mono);
}

.nav-links { display: flex; align-items: center; gap: 24px; margin-left: auto; color: var(--ink-dim); font-size: 13px; }
.nav-links a { position: relative; padding: 6px 0; transition: color .15s var(--ease); }
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--accent); }
.nav-links a.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 1.5px; background: var(--accent);
}
.ext { font-size: 10px; opacity: .8; }

.header-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.nav-links + .header-actions { margin-left: 0; }

.theme-toggle {
  display: grid; place-items: center; width: 36px; height: 36px;
  border: 1px solid var(--line); border-radius: 9px;
  background: var(--surface); color: var(--ink-dim); cursor: pointer;
  transition: border-color .15s var(--ease), color .15s var(--ease);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.theme-toggle svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
html[data-theme="light"] .ico-sun { display: none; }
html[data-theme="dark"] .ico-moon { display: none; }

.nav-toggle { display: none; width: 36px; height: 36px; padding: 0; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); color: var(--ink); cursor: pointer; }
.nav-toggle span { display: block; width: 15px; height: 1.5px; margin: 3px auto; background: currentColor; border-radius: 2px; }

.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 38px; padding: 0 15px; border-radius: 8px;
  background: var(--ink); color: var(--bg);
  font-size: 12.5px; font-weight: 550;
  transition: background .16s var(--ease), transform .16s var(--ease);
}
.nav-cta:hover { background: var(--accent); color: var(--on-accent); }
.nav-cta svg, .hero-cta svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

.scroll-progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; }
.scroll-progress i { display: block; height: 100%; background: var(--accent); transform: scaleX(0); transform-origin: left; }

/* -------------------------------------------------------------------- Hero */

.hero { display: grid; gap: 44px; padding: 54px 0 66px; text-align: left; }
.hero-text {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr);
  gap: 18px 52px;
  align-items: end;
}
.hero-text .eyebrow { grid-column: 1 / -1; }
.hero-side { display: grid; gap: 20px; align-content: end; padding-bottom: 8px; }
.eyebrow {
  display: flex; align-items: center; gap: 9px;
  color: var(--accent); font: 500 10.5px var(--font-mono);
  text-transform: uppercase; letter-spacing: .11em;
}
.eyebrow::before { content: ''; width: 18px; height: 1px; background: currentColor; }
.hero .eyebrow { justify-content: flex-start; }

.hero h1 {
  max-width: 22ch;
  margin: 0;
  font-size: clamp(44px, 5.6vw, 82px);
  line-height: 1.02;
  letter-spacing: -.05em;
}
.hero h1 em { color: var(--accent); font-style: normal; }
.hero-copy { max-width: 46ch; margin: 0; color: var(--ink-dim); font-size: 15px; line-height: 1.72; }

.hero-actions { display: flex; align-items: center; justify-content: flex-start; gap: 18px; margin: 0; flex-wrap: wrap; }
.hero-cta {
  display: inline-flex; align-items: center; gap: 10px;
  min-height: 46px; padding: 0 18px; border-radius: 8px;
  background: var(--accent); color: var(--on-accent);
  font-size: 13.5px; font-weight: 550;
  transition: filter .16s var(--ease), transform .16s var(--ease);
}
.hero-cta:hover { filter: brightness(1.08); transform: translateY(-1px); }
.text-link { color: var(--ink-dim); font-size: 13px; border-bottom: 1px solid var(--line-2); padding: 4px 0; }
.text-link:hover { color: var(--accent); border-color: var(--accent); }

.hero-install {
  display: flex; align-items: center; gap: 10px;
  margin: 0; padding: 7px 8px 7px 13px;
  border: 1px solid var(--line); border-radius: var(--r-md);
  background: var(--surface);
  width: fit-content; max-width: 100%;
}
.hero-install code { color: var(--ink); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.hero-facts {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px 34px;
  margin: 0; padding: 24px 0 0;
  list-style: none; text-align: left;
  border-top: 1px solid var(--line);
}
.hero-facts li { display: grid; gap: 3px; padding-left: 20px; position: relative; }
.hero-facts li::before { content: '✓'; position: absolute; left: 0; top: 1px; color: var(--accent); font: 600 12px var(--font-mono); }
.hero-facts b { font-size: 13px; font-weight: 600; }
.hero-facts span { color: var(--ink-faint); font-size: 12px; line-height: 1.6; }

.hero-shot { margin: 46px 0 0; }
.browser-frame {
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: var(--surface-2); padding: 12px;
  box-shadow: var(--shadow);
}
.browser-bar { display: flex; align-items: center; gap: 12px; padding: 0 4px 11px; color: var(--ink-faint); font: 500 10px var(--font-mono); letter-spacing: .04em; }
.browser-dots { display: flex; gap: 5px; }
.browser-dots i { width: 7px; height: 7px; border-radius: 50%; background: var(--line-2); }
.browser-url { padding: 3px 10px; border-radius: 99px; background: var(--code-bg); }
.browser-tag { margin-left: auto; color: var(--accent); }
.browser-frame img { border: 1px solid var(--line); border-radius: 9px; }
.hero-shot figcaption { margin-top: 14px; color: var(--ink-faint); font-size: 12px; }

/* ---------------------------------------------------------- Local projects */

.projects { padding: 76px 0; border-top: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: 1.15fr 1fr; gap: 10px 48px; margin-bottom: 40px; }
.section-heading .eyebrow { grid-column: 1 / -1; }
.section-heading h2 { font-size: clamp(29px, 3.3vw, 42px); line-height: 1.08; letter-spacing: -.038em; max-width: 26ch; }
.section-heading p { align-self: end; max-width: 42ch; color: var(--ink-dim); font-size: 13.5px; }
.section-heading p .mini-btn { margin-right: 6px; }

.project-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; }
.project-card {
  display: grid; gap: 8px; padding: 18px;
  border: 1px solid var(--line); border-radius: var(--r-md);
  background: var(--surface);
  transition: border-color .16s var(--ease), transform .16s var(--ease);
}
.project-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.project-card b { font-size: 14px; font-weight: 600; letter-spacing: -.01em; }
.project-card span { color: var(--ink-faint); font: 11px var(--font-mono); }
.project-card .mini-btn { justify-self: start; margin-top: 4px; }
.project-note { margin-top: 16px; color: var(--ink-faint); font-size: 12px; }

/* ----------------------------------------------------------------- Pillars */

.pillars { padding: 76px 0; border-top: 1px solid var(--line); }
.pillar-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.pillar {
  padding: 24px 22px; border: 1px solid var(--line); border-radius: var(--r-md);
  background: var(--surface);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}
.pillar:hover { border-color: var(--line-2); transform: translateY(-2px); }
.pillar-icon { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--line); border-radius: 9px; color: var(--accent); }
.pillar-icon svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.pillar h3 { margin: 16px 0 8px; font-size: 19px; letter-spacing: -.025em; }
.pillar p { color: var(--ink-dim); font-size: 13px; line-height: 1.7; }
.pillar code { padding: 1px 5px; border-radius: 4px; background: var(--code-bg); font-size: 12px; }

/* ------------------------------------------------------------ Demo frame */

.hero-demo { min-width: 0; }
.demo-head { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; margin-bottom: 12px; }
.demo-head .eyebrow { justify-content: flex-start; }
.demo-note { color: var(--ink-faint); font: 500 10.5px var(--font-mono); white-space: nowrap; }

.demo {
  container-type: inline-size;
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: var(--surface-2); overflow: hidden;
  box-shadow: var(--shadow);
}
.demo-chrome { display: flex; align-items: center; gap: 12px; padding: 11px 14px; border-bottom: 1px solid var(--line); background: var(--surface); color: var(--ink-faint); font: 500 10.5px var(--font-mono); }
.demo-dots { display: flex; gap: 5px; }
.demo-dots i { width: 7px; height: 7px; border-radius: 50%; background: var(--line-2); }
.demo-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.demo-status { margin-left: auto; color: var(--accent); white-space: nowrap; }
.demo.building .demo-status { color: var(--warn); }
.demo.ok .demo-status { color: var(--good); }

.demo-body { display: grid; grid-template-columns: 42px 196px minmax(0, 1fr) minmax(280px, .92fr); min-height: 430px; }
.demo-body[data-view="source"] { grid-template-columns: 42px 196px minmax(0, 1fr); }
.demo-body[data-view="source"] .demo-pdf { display: none; }
.demo-body[data-view="pdf"] { grid-template-columns: 42px minmax(0, 1fr); }
.demo-body[data-view="pdf"] .demo-panels, .demo-body[data-view="pdf"] .demo-editor { display: none; }

.demo-rail { display: flex; flex-direction: column; align-items: center; gap: 5px; padding: 12px 0; border-right: 1px solid var(--line); background: var(--surface); }
.demo-rail-btn { display: grid; place-items: center; width: 28px; height: 28px; border: 0; border-radius: 6px; background: transparent; color: var(--ink-faint); cursor: pointer; transition: background .15s var(--ease), color .15s var(--ease); }
.demo-rail-btn svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.demo-rail-btn:hover { background: var(--accent-soft); color: var(--ink); }
.demo-rail-btn.active { background: var(--accent-soft); color: var(--accent); }

.demo-panels { border-right: 1px solid var(--line); background: var(--surface); overflow: hidden; }
.demo-panel { display: none; flex-direction: column; gap: 2px; padding: 12px 10px; }
.demo-panel.active { display: flex; }
.demo-overline { padding: 0 4px 8px; color: var(--ink-faint); font: 500 9.5px var(--font-mono); letter-spacing: .07em; text-transform: uppercase; }
.demo-file, .demo-outline, .demo-bib, .demo-hist {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 7px 9px; border: 1px solid transparent; border-radius: 6px;
  background: transparent; color: var(--ink-dim); font: 500 11.5px var(--font-mono); text-align: left; cursor: pointer;
  transition: background .14s var(--ease), color .14s var(--ease), border-color .14s var(--ease);
}
.demo-file:hover, .demo-outline:hover, .demo-bib:hover, .demo-hist:hover { background: var(--accent-soft); color: var(--ink); }
.demo-file.active { background: var(--accent-soft); color: var(--accent); }
.demo-outline { font-family: var(--font-ui); font-size: 12px; }
.demo-outline b { min-width: 24px; color: var(--ink-faint); font: 500 10px var(--font-mono); text-align: right; }
.demo-outline.sub { padding-left: 22px; }
.demo-outline.current { background: var(--accent-soft); color: var(--ink); }
.demo-bib, .demo-hist { display: grid; gap: 2px; font-family: var(--font-ui); }
.demo-bib b, .demo-hist b { color: var(--ink); font: 550 11.5px var(--font-mono); }
.demo-bib span, .demo-hist span { color: var(--ink-faint); font-size: 10.5px; }
.demo-bib em, .demo-hist em { color: var(--accent); font: 500 9.5px var(--font-mono); font-style: normal; }
.demo-bib.done { border-color: var(--accent); }
.demo-bib-warn { margin-top: 6px; padding: 7px 9px; border: 1px solid color-mix(in srgb, var(--warn) 40%, var(--line)); border-radius: 6px; background: color-mix(in srgb, var(--warn) 9%, transparent); color: var(--warn); font-size: 10.5px; }
.demo-diff { display: grid; gap: 3px; margin-top: 8px; padding: 8px 9px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface-2); font: 500 10px var(--font-mono); }
.demo-diff[hidden] { display: none; }
.demo-diff .add { color: var(--good); }
.demo-diff .del { color: var(--err); }

.demo-editor { border-right: 1px solid var(--line); background: var(--surface-2); min-width: 0; }
.demo-tabs { display: flex; gap: 2px; padding: 8px 10px; border-bottom: 1px solid var(--line); background: var(--surface); }
.demo-tabs span { padding: 4px 9px; border-radius: 5px; color: var(--ink-faint); font: 500 10.5px var(--font-mono); }
.demo-tabs span.active { background: var(--accent-soft); color: var(--ink); }
.demo-code { display: grid; gap: 1px; padding: 10px 0; }
.demo-line { display: flex; align-items: baseline; gap: 8px; width: 100%; padding: 4px 12px; border: 0; border-left: 2px solid transparent; background: transparent; color: var(--ink-dim); font: 500 11.5px var(--font-mono); text-align: left; cursor: pointer; transition: background .14s var(--ease); }
.demo-line:hover { background: var(--accent-soft); }
.demo-line i { min-width: 20px; color: var(--ink-faint); font-style: normal; text-align: right; }
.demo-line .c-cmd { color: var(--accent); }
.demo-line .c-arg { color: var(--accent-2); }
.demo-line .c-cite { color: var(--accent); }
.demo-line .c-txt { color: var(--ink-dim); }
.demo-line.sync-active { border-left-color: var(--accent); background: var(--accent-soft); }
.demo-line[hidden] { display: none; }

.demo-pdf { padding: 16px; background: var(--code-bg); }
.demo-page { display: grid; gap: 10px; align-content: start; height: 100%; padding: 24px 20px; border-radius: 4px; background: #ffffff; box-shadow: 0 1px 0 rgba(0, 0, 0, .06); }
.demo-page-title { color: #1c1f1d; font-family: var(--font-display); font-size: 15px; line-height: 1.25; text-align: center; }
.demo-page-meta { color: #7c8480; font: 10px var(--font-mono); text-align: center; }
.demo-pdf-block { display: grid; gap: 3px; padding: 8px 9px; border: 1px solid transparent; border-radius: 5px; background: transparent; color: #4d554f; text-align: left; cursor: pointer; transition: background .14s var(--ease); }
.demo-pdf-block b { color: #222825; font-family: var(--font-display); font-size: 12.5px; font-weight: 600; }
.demo-pdf-block span { color: #6b736d; font-family: Georgia, serif; font-size: 11px; line-height: 1.6; }
.demo-pdf-block.eq { grid-template-columns: 1fr auto; align-items: center; font-family: Georgia, serif; }
.demo-pdf-block.eq em { color: #333b35; font-size: 12.5px; }
.demo-pdf-block:hover { background: #f1f4f1; }
.demo-pdf-block.sync-active { background: #e6f0e9; border-color: #b9d3c3; }

.demo-toolbar { display: flex; align-items: center; gap: 12px; padding: 10px 14px; border-top: 1px solid var(--line); background: var(--surface); }
.demo-views { display: flex; gap: 2px; padding: 2px; border-radius: 7px; background: var(--code-bg); }
.demo-views button { min-height: 26px; padding: 0 11px; border: 0; border-radius: 5px; background: transparent; color: var(--ink-dim); font: 500 11px var(--font-ui); cursor: pointer; }
.demo-views button.active { background: var(--surface); color: var(--ink); }
.demo-build { display: inline-flex; align-items: center; gap: 8px; min-height: 30px; padding: 0 12px; border: 1px solid var(--line-2); border-radius: 7px; background: var(--surface); color: var(--accent); font: 550 11.5px var(--font-ui); cursor: pointer; }
.demo-build:hover { border-color: var(--accent); }
.demo-build kbd { padding: 2px 5px; border: 1px solid var(--line); border-radius: 4px; color: var(--ink-faint); font: 500 9.5px var(--font-mono); }
.demo-hint { margin-left: auto; color: var(--ink-faint); font-size: 11.5px; text-align: right; }

/* Compact demo: panels, source and page stacked next to the rail. Used both in
   the narrow hero column and on small screens (container query, not viewport). */
@container (max-width: 800px) {
  .demo-body, .demo-body[data-view="source"] {
    grid-template-columns: 34px minmax(0, 1fr);
    min-height: 0;
  }
  .demo-body[data-view="pdf"] { grid-template-columns: 34px minmax(0, 1fr); }
  .demo-rail { grid-row: 1 / -1; }
  .demo-panels { grid-column: 2; max-height: 132px; overflow: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .demo-editor { grid-column: 2; border-right: 0; border-bottom: 1px solid var(--line); }
  .demo-pdf { grid-column: 2; max-height: 206px; padding: 11px; overflow: auto; scrollbar-width: thin; }
  .demo-page { padding: 14px 12px; gap: 6px; }
  .demo-page-title { font-size: 13.5px; }
  .demo-pdf-block { padding: 6px 8px; }
  .demo-pdf-block span { font-size: 10.5px; }
  .demo-body[data-view="source"] .demo-pdf { display: none; }
  .demo-body[data-view="pdf"] .demo-panels, .demo-body[data-view="pdf"] .demo-editor { display: none; }
  .demo-body[data-view="pdf"] .demo-pdf { display: block; max-height: 360px; }
  .demo-toolbar { flex-wrap: wrap; gap: 8px 10px; }
  .demo-hint { flex-basis: 100%; margin-left: 0; text-align: left; }
}

@container (max-width: 420px) {
  .demo-panels { max-height: 122px; }
  .demo-hint { display: none; }
}

/* ------------------------------------------------------------------- Tour */

.tour { padding: 76px 0; border-top: 1px solid var(--line); }
.tour-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.tour-tab {
  display: inline-flex; align-items: center; gap: 9px;
  min-height: 38px; padding: 0 15px;
  border: 1px solid var(--line); border-radius: 99px;
  background: var(--surface); color: var(--ink-dim);
  font: 550 12.5px var(--font-ui); cursor: pointer;
  transition: all .16s var(--ease);
}
.tour-tab i { color: var(--ink-faint); font: 500 10px var(--font-mono); font-style: normal; }
.tour-tab:hover { border-color: var(--line-2); transform: translateY(-1px); }
.tour-tab.active { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.tour-tab.active i { color: var(--ink-faint); }

.tour-stage {
  display: grid; grid-template-columns: minmax(300px, .85fr) minmax(420px, 1.15fr);
  gap: 48px; align-items: center;
  padding: 34px 36px;
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: var(--surface);
}
.tour-copy h3 { font-size: clamp(22px, 2.4vw, 29px); line-height: 1.16; letter-spacing: -.028em; }
.tour-copy p { margin: 12px 0 18px; color: var(--ink-dim); font-size: 13.5px; line-height: 1.72; }
.tour-points { display: grid; gap: 9px; margin: 0 0 24px; padding: 0; list-style: none; }
.tour-points li { position: relative; padding-left: 22px; color: var(--ink-dim); font-size: 12.5px; line-height: 1.6; }
.tour-points li::before { content: '✓'; position: absolute; left: 0; top: 0; color: var(--accent); font: 600 11px var(--font-mono); }
.tour-actions { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.tour-hint { color: var(--ink-faint); font: 10.5px var(--font-mono); }
.tour-demo { min-height: 300px; }
.tour-demo.swap .mock { animation: mockIn .35s var(--ease); }
@keyframes mockIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.mock { border: 1px solid var(--line); border-radius: var(--r-md); background: var(--surface-2); overflow: hidden; font-family: var(--font-mono); }
.mock-bar { display: flex; align-items: center; justify-content: space-between; padding: 9px 13px; border-bottom: 1px solid var(--line); background: var(--surface); color: var(--ink); font-size: 10.5px; }
.mock-bar em { color: var(--ink-faint); font-style: normal; letter-spacing: .06em; text-transform: uppercase; font-size: 9px; }
.mock-code { display: grid; gap: 5px; padding: 15px 13px; font-size: 11px; color: var(--ink); }
.mock-code .mc-l { display: inline-block; width: 22px; color: var(--ink-faint); }
.mc-cmd { color: var(--accent); font-weight: 500; }
.mc-arg { color: var(--accent-2); }
.mc-dim { color: var(--ink-faint); }
.mock-caret { display: inline-block; width: 1.5px; height: 12px; margin-left: 2px; background: var(--accent); vertical-align: -2px; animation: caret 1.1s steps(2) infinite; }
@keyframes caret { 50% { opacity: 0; } }
.mock-pop { margin: 4px 13px 15px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); overflow: hidden; }
.mock-pop-item { display: flex; align-items: baseline; gap: 10px; padding: 7px 11px; font-size: 10.5px; color: var(--ink-faint); }
.mock-pop-item b { color: var(--ink); font-weight: 550; }
.mock-pop-item.active { background: var(--accent-soft); }
.mock-log { display: grid; gap: 6px; padding: 15px 13px; font-size: 10.5px; }
.ml { color: var(--ink-dim); }
.ml.dim { color: var(--ink-faint); }
.ml.warn { color: var(--warn); }
.ml.ok { color: var(--good); font-weight: 500; }
.mock-toc-group { padding: 9px 13px 5px; border-bottom: 1px solid var(--line); color: var(--ink-faint); font-size: 9px; letter-spacing: .08em; text-transform: uppercase; }
.mock-toc-row { display: flex; align-items: baseline; gap: 11px; padding: 7px 13px; font-family: var(--font-ui); font-size: 12px; color: var(--ink-dim); }
.mock-toc-row b { min-width: 26px; color: var(--ink-faint); font: 500 10px var(--font-mono); text-align: right; }
.mock-toc-row.sub { padding-left: 28px; }
.mock-toc-row.hl { position: relative; background: var(--accent-soft); color: var(--ink); }
.mock-toc-row.hl::before { content: ''; position: absolute; left: 0; top: 4px; bottom: 4px; width: 2.5px; border-radius: 2px; background: var(--accent); }
.mock-toc-row em { margin-left: auto; color: var(--accent); font: 500 9px var(--font-mono); font-style: normal; letter-spacing: .05em; text-transform: uppercase; }
.mock-cite-row { display: grid; gap: 2px; padding: 10px 13px; border-bottom: 1px solid var(--line); font-family: var(--font-ui); }
.mock-cite-row b { color: var(--ink); font-size: 11.5px; font-weight: 600; }
.mock-cite-row span { color: var(--ink-faint); font-size: 10.5px; }
.mock-cite-row.active { background: var(--surface); }
.mock-cite-chip { margin: 12px 13px 15px; padding: 8px 11px; border: 1px dashed var(--line-2); border-radius: 8px; background: var(--surface); color: var(--accent); font-size: 10.5px; }
.mock-hist-row { display: flex; align-items: center; gap: 9px; padding: 9px 13px; border-bottom: 1px solid var(--line); font-family: var(--font-ui); font-size: 11.5px; color: var(--ink); }
.mock-hist-row i { display: grid; place-items: center; width: 21px; height: 21px; border: 1px solid var(--line); border-radius: 6px; font-style: normal; font-size: 9px; color: var(--ink-faint); }
.mock-hist-row i.mh-save { color: var(--accent); }
.mock-hist-row i.mh-build { color: var(--accent-2); }
.mock-hist-row span { margin-left: auto; color: var(--ink-faint); font: 500 9.5px var(--font-mono); }
.mock-hist-row em.mh-btn { padding: 3px 8px; border: 1px solid var(--line); border-radius: 5px; background: var(--surface); color: var(--accent); font-size: 9px; font-style: normal; }
.mock-diff { display: grid; gap: 3px; margin: 11px 13px 15px; padding: 9px 11px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); font: 500 9.5px var(--font-mono); }
.mock-diff .add { color: var(--good); }
.mock-diff .del { color: var(--err); }

/* ------------------------------------------------------- Feature explorer */

.deep-features { padding: 76px 0; border-top: 1px solid var(--line); }
.explorer-controls { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 24px; }
#feature-filter { flex: 1; min-width: 220px; max-width: 380px; height: 40px; padding: 0 14px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); color: var(--ink); font: inherit; font-size: 13px; }
.explorer-chips { display: flex; flex-wrap: wrap; gap: 7px; }
.exp-chip { min-height: 32px; padding: 0 13px; border: 1px solid var(--line); border-radius: 99px; background: transparent; color: var(--ink-dim); font: 550 11.5px var(--font-ui); cursor: pointer; transition: all .15s var(--ease); }
.exp-chip:hover { border-color: var(--line-2); color: var(--ink); }
.exp-chip.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.explorer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; min-height: 120px; }
.feat-card { display: flex; flex-direction: column; align-items: flex-start; padding: 20px 20px 16px; border: 1px solid var(--line); border-radius: var(--r-md); background: var(--surface); transition: border-color .18s var(--ease), transform .18s var(--ease); }
.feat-card:hover { border-color: var(--line-2); transform: translateY(-2px); }
.feat-card h3 { margin: 10px 0 7px; font: 600 14px var(--font-ui); letter-spacing: -.012em; }
.feat-card p { margin: 0 0 12px; color: var(--ink-dim); font-size: 12.5px; line-height: 1.68; }
.feat-card kbd { margin-top: auto; padding: 3px 8px; border: 1px solid var(--line); border-radius: 5px; background: var(--code-bg); color: var(--accent); font: 500 10px var(--font-mono); }
.feature-index { color: var(--accent); font: 500 10px var(--font-mono); text-transform: uppercase; letter-spacing: .1em; }

/* -------------------------------------------------------------- Templates */

.templates { padding: 76px 0; border-top: 1px solid var(--line); }
.template-grid-landing { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.tpl-card { display: grid; gap: 6px; padding: 20px 18px; border: 1px solid var(--line); border-radius: var(--r-md); background: var(--surface); color: inherit; font: inherit; text-align: left; cursor: pointer; transition: border-color .15s var(--ease), transform .15s var(--ease); }
.tpl-card:hover { border-color: var(--line-2); transform: translateY(-2px); }
.tpl-card.active { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.tpl-card strong { font-size: 13.5px; font-weight: 600; }
.tpl-card span { color: var(--ink-dim); font-size: 12px; line-height: 1.6; }
.tpl-card em { color: var(--accent); font: 500 9.5px var(--font-mono); font-style: normal; letter-spacing: .06em; text-transform: uppercase; }
.template-preview { margin-top: 12px; border: 1px solid var(--line); border-radius: var(--r-md); background: var(--surface); overflow: hidden; }
.template-preview-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 14px; border-bottom: 1px solid var(--line); color: var(--ink-faint); font: 500 10.5px var(--font-mono); }
.template-preview-actions { display: flex; gap: 8px; }
.template-preview-code { margin: 0; padding: 16px; max-height: 320px; overflow: auto; color: var(--ink); font-size: 11.5px; line-height: 1.75; white-space: pre; }

.mini-btn { padding: 6px 11px; border: 1px solid var(--line); border-radius: var(--r-sm); background: var(--surface); color: var(--ink); font: 550 11px var(--font-ui); cursor: pointer; transition: border-color .15s var(--ease), background .15s var(--ease); }
.mini-btn:hover { border-color: var(--accent); color: var(--accent); }
.mini-btn.primary { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.mini-btn.primary:hover { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }

/* -------------------------------------------------------------- Shortcuts */

.keys { padding: 76px 0; border-top: 1px solid var(--line); }
.keys-filter-row { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.keys-filter-row input { flex: 1; max-width: 340px; height: 38px; padding: 0 13px; border: 1px solid var(--line); border-radius: var(--r-sm); background: var(--surface); color: var(--ink); font: inherit; font-size: 13px; }
.keys-count { color: var(--ink-faint); font: 10.5px var(--font-mono); }
.keys-empty { padding: 18px 0; color: var(--ink-faint); font-size: 12.5px; }
.keys-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 40px; }
.key-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.key-row kbd { padding: 4px 9px; border: 1px solid var(--line); border-radius: 5px; background: var(--code-bg); color: var(--ink-dim); font: 500 10.5px var(--font-mono); }

/* ------------------------------------------------------------ Quick start */

.quickstart { padding: 76px 0; border-top: 1px solid var(--line); }
.quickstart-tabs { display: flex; gap: 7px; margin-bottom: 18px; }
.quickstart-tab { min-height: 34px; padding: 0 14px; border: 1px solid var(--line); border-radius: 99px; background: transparent; color: var(--ink-dim); font: 550 12px var(--font-ui); cursor: pointer; transition: all .15s var(--ease); }
.quickstart-tab:hover { border-color: var(--line-2); color: var(--ink); }
.quickstart-tab.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.quickstart-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.cmd-block { display: flex; align-items: center; gap: 12px; padding: 16px; border: 1px solid var(--line); border-radius: var(--r-md); background: var(--surface); }
.cmd-label { color: var(--accent); font: 500 9.5px var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
.cmd-block code { flex: 1; overflow: hidden; color: var(--ink); font-size: 12.5px; text-overflow: ellipsis; white-space: nowrap; }
.requirements { display: grid; gap: 8px; margin: 20px 0 0; padding: 0; list-style: none; }
.requirements li { position: relative; padding-left: 20px; color: var(--ink-dim); font-size: 12.5px; }
.requirements li::before { content: '·'; position: absolute; left: 6px; top: -2px; color: var(--accent); font-size: 18px; }

/* ---------------------------------------------------------------- Privacy */

.privacy { display: grid; grid-template-columns: 1.15fr 1fr; gap: 14px 52px; align-items: start; padding: 76px 0; border-top: 1px solid var(--line); }
.privacy-copy .eyebrow { margin-bottom: 14px; }
.privacy h2 { font-size: clamp(28px, 3.2vw, 40px); line-height: 1.1; letter-spacing: -.038em; max-width: 24ch; }
.privacy-copy p { margin: 14px 0 20px; max-width: 52ch; color: var(--ink-dim); font-size: 13.5px; line-height: 1.75; }
.privacy-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.privacy-list { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.privacy-list li { display: grid; gap: 2px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.privacy-list b { font-size: 13px; font-weight: 600; }
.privacy-list span { color: var(--ink-dim); font-size: 12.5px; }

/* -------------------------------------------------------------------- FAQ */

.faq { padding: 76px 0; border-top: 1px solid var(--line); }
.faq-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 40px; }
.faq-list details { padding: 16px 0; border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; align-items: center; gap: 10px; cursor: pointer; list-style: none; font-size: 13.5px; font-weight: 600; }
.faq-list summary::before { content: '+'; color: var(--accent); font: 400 15px var(--font-mono); }
.faq-list details[open] summary::before { content: '–'; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list p { margin: 10px 0 0 25px; color: var(--ink-dim); font-size: 12.5px; line-height: 1.72; }
.faq-list code { padding: 1px 5px; border-radius: 4px; background: var(--code-bg); font-size: 12px; }

/* ------------------------------------------------------------------- CTA */

.closing {
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
  margin: 20px 0 60px; padding: 44px 46px;
  border-radius: var(--r-lg);
  background: var(--ink); color: var(--bg);
}
.closing .eyebrow { color: var(--accent-2); }
.closing h2 { margin: 14px 0 10px; font-size: clamp(28px, 3.2vw, 40px); line-height: 1.06; letter-spacing: -.034em; }
.closing p { max-width: 52ch; opacity: .82; font-size: 13.5px; }
.closing .hero-cta { flex: none; background: var(--bg); color: var(--ink); }
.closing .hero-cta:hover { background: var(--accent); color: var(--on-accent); }

/* ---------------------------------------------------------------- Footer */

.site-footer { display: grid; grid-template-columns: 1.2fr 1.6fr; gap: 24px 40px; padding: 40px 0 28px; border-top: 1px solid var(--line); }
.footer-brand { display: grid; gap: 12px; align-content: start; }
.footer-brand p { max-width: 40ch; color: var(--ink-faint); font-size: 11.5px; line-height: 1.65; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.footer-links div { display: grid; gap: 7px; align-content: start; }
.footer-links span { color: var(--ink-faint); font: 500 10px var(--font-mono); letter-spacing: .09em; text-transform: uppercase; }
.footer-links a { color: var(--ink-dim); font-size: 12.5px; }
.footer-links a:hover { color: var(--accent); }
.footer-meta { grid-column: 1 / -1; display: flex; justify-content: space-between; gap: 16px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--ink-faint); font-size: 11px; }

.to-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 70;
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--surface); color: var(--accent);
  font-size: 16px; cursor: pointer; opacity: 0; pointer-events: none;
  transform: translateY(8px);
  transition: opacity .2s var(--ease), transform .2s var(--ease);
}
.to-top.visible { opacity: 1; pointer-events: auto; transform: none; }
.to-top:hover { border-color: var(--accent); }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ------------------------------------------------------------- Responsive */

@media (max-width: 1080px) {
  .site-shell { padding: 0 24px; }
  .site-header { margin: 0 -24px; padding: 0 24px; gap: 16px; }
  .nav-links { gap: 16px; font-size: 12.5px; }
  .hero { gap: 36px; padding: 48px 0 56px; }
  .hero-text { grid-template-columns: minmax(0, 1fr) minmax(280px, .92fr); gap: 16px 36px; }
  .hero h1 { font-size: clamp(40px, 6vw, 64px); }
  .pillar-grid, .explorer-grid, .template-grid-landing { grid-template-columns: repeat(2, 1fr); }
  .tour-stage { grid-template-columns: 1fr; gap: 28px; padding: 26px 22px; }
  .tour-demo { min-height: 0; }
  .privacy { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 820px) {
  .nav-toggle { display: block; margin-left: auto; }
  .header-actions { margin-left: 0; }
  .nav-links {
    position: absolute; left: 0; right: 0; top: 74px;
    display: none; flex-direction: column; align-items: flex-start; gap: 4px;
    padding: 14px 24px 20px;
    border-bottom: 1px solid var(--line);
    background: var(--bg);
  }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; padding: 9px 0; font-size: 14px; }
  .nav-links a.active::after { display: none; }
  .hero { gap: 32px; padding: 40px 0 48px; }
  .hero-text { grid-template-columns: 1fr; gap: 16px; align-items: start; }
  .hero-text .eyebrow { grid-column: auto; }
  .hero h1 { max-width: 24ch; font-size: clamp(36px, 7vw, 48px); }
  .hero-side { gap: 16px; padding-bottom: 0; }
  .hero-copy { max-width: 62ch; }
  .hero-demo { width: 100%; }
  .hero-facts { grid-template-columns: 1fr; gap: 14px; margin-top: 0; padding-top: 20px; }
  .section-heading { grid-template-columns: 1fr; gap: 8px; margin-bottom: 28px; }
  .section-heading p { max-width: 60ch; }
  .pillars, .tour, .deep-features, .templates, .keys, .quickstart, .faq, .projects { padding: 56px 0; }
  .keys-grid, .faq-list, .quickstart-grid { grid-template-columns: 1fr; }
  .closing { flex-direction: column; align-items: flex-start; padding: 32px 26px; margin-bottom: 44px; }
  .site-footer { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .footer-meta { flex-direction: column; gap: 6px; }
}

@media (max-width: 560px) {
  .site-shell { padding: 0 16px; }
  .site-header { margin: 0 -16px; padding: 0 16px; height: 64px; }
  .nav-links { top: 64px; padding: 12px 16px 18px; }
  .version-badge { display: none; }
  .pillar-grid, .explorer-grid, .template-grid-landing { grid-template-columns: 1fr; }
  .hero-facts { gap: 10px; }
  .mock-code { font-size: 10px; }
  .template-preview-code { font-size: 10.5px; }
  .keys-filter-row { flex-wrap: wrap; }
  .to-top { right: 14px; bottom: 14px; }
}

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