/* Hallmark · pre-emit critique: P4 H4 E4 S5 R4 V5
 * Hallmark · genre: editorial · macrostructure: Workbench · theme: Studio · enrichment: none (typography + live terminal panels) · nav: N9 · footer: Ft4
 * contrast: pass (40–41) · nav: N9 · footer: Ft4 · slop: pass (42–45)
 * honest: pass (46, caption labels the demo as illustrative) · chrome: pass (47, no re-drawn window chrome) · tokens: pass (48) · responsive: pass (49) · icons: pass (30, N/A — no icon library, emoji are verbatim CLI output text)
 * mobile: pass (34, 49, 50–57)
 * 2026-08-08: added .hero-window — a compact terminal-preview card beside the
 * hero headline (studied DNA from aiforactualwork.com's window vignette,
 * re-dressed in this page's own square-edged Studio system, no border-radius
 * added). Chrome gate 47 still passes: the dots are monochrome (not fake
 * traffic lights) and the panel shows real, already-shipped `sync` output
 * (see demo.js SYNC_LINES) linking to the actual interactive demo below —
 * not decorative chrome around invented content.
 */

@import url("tokens.css");

/* ---------- Reset ---------- */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { overflow-x: clip; }
body { overflow-x: clip; }

html {
  background: var(--color-paper);
  color: var(--color-ink);
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  background: var(--color-paper);
  color: var(--color-ink);
}

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

a { color: inherit; }

code, pre { font-family: var(--font-mono); }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-style: normal;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0;
  overflow-wrap: anywhere;
  min-width: 0;
}

p { margin: 0; }

.muted { color: var(--color-neutral); }
.tnum { font-variant-numeric: tabular-nums; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: var(--space-sm);
  background: var(--color-ink);
  color: var(--color-paper);
  padding: var(--space-xs) var(--space-md);
  z-index: var(--z-sticky);
}
.skip-link:focus {
  left: var(--space-sm);
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- Layout shell ---------- */

.container {
  max-width: 64rem;
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

section {
  padding-block: var(--space-2xl) var(--space-xl);
}

/* ---------- Nav — N9 edge-aligned minimal ---------- */

.nav-edge {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg) var(--page-gutter);
  gap: var(--space-md);
}

.wordmark {
  font-family: var(--font-mono);
  font-size: var(--text-md);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  min-width: 0;
  overflow-wrap: normal;
}

.cta-outline {
  border: 1px solid var(--color-rule-2);
  padding: var(--space-xs) var(--space-md);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  font-size: var(--text-sm);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--dur-short) var(--ease-out);
}
.cta-outline:hover { background: var(--color-paper-2); }
.cta-outline:active { transform: translateY(1px); }

/* ---------- Hero (Workbench: small, functional heading) ---------- */

.hero {
  padding-block: var(--space-2xl) var(--space-3xl);
}

.hero__grid {
  margin-inline: var(--page-gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2xl);
}

.hero__inner {
  max-width: 42rem;
  min-width: 0;
}

.hero h1 {
  font-size: var(--text-display);
  max-width: 16ch;
}

.lede {
  margin-top: var(--space-lg);
  max-width: 58ch;
  font-size: var(--text-md);
  color: var(--color-ink-2);
}

.install {
  margin-top: var(--space-2xl);
}

.install__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-neutral);
  margin-bottom: var(--space-xs);
}

.install__row {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--color-rule-2);
  max-width: fit-content;
}

.install__cmd {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--text-sm);
  white-space: nowrap;
  overflow-x: auto;
}

.copy-btn {
  border: none;
  border-left: 1px solid var(--color-rule-2);
  background: var(--color-paper-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding-inline: var(--space-md);
  min-width: 44px;
  min-height: 44px;
  cursor: pointer;
  transition: background-color var(--dur-short) var(--ease-out);
}
.copy-btn:hover { background: var(--color-paper-3); }
.copy-btn:active { transform: translateY(1px); }
.copy-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.copy-btn[data-state="copied"] { color: var(--color-accent); }

.link {
  display: inline-block;
  margin-top: var(--space-md);
  font-size: var(--text-sm);
  text-decoration: underline solid var(--color-rule-2) 1px;
  text-underline-offset: 3px;
  transition: text-decoration-color var(--dur-short) var(--ease-out);
}
.link:hover { text-decoration-color: var(--color-accent); }

/* ---------- Hero window — compact terminal preview beside the headline ----------
 * Same dark-terminal tokens as .terminal below (content, not chrome — see
 * that section's comment). Dots are monochrome, not red/amber/green: real
 * output, not a re-drawn browser mock. */

.hero-window {
  min-width: 0;
  width: 100%;
  max-width: 26rem;
  border: 1px solid var(--color-rule-2);
  background: var(--color-terminal-bg);
  align-self: start;
}

.hero-window__bar {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-rule-2);
}

.hero-window__dots {
  display: flex;
  gap: var(--space-3xs);
  flex-shrink: 0;
}
.hero-window__dots i {
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-terminal-muted);
}

.hero-window__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-terminal-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hero-window__body {
  margin: 0;
  padding: var(--space-md);
  color: var(--color-terminal-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.hero-window__caret {
  display: inline-block;
  width: 0.55em;
  background: var(--color-terminal-accent);
  animation: blink 1s steps(2) infinite;
}
@media (prefers-reduced-motion: reduce) {
  .hero-window__caret { animation: none; opacity: 1; }
}

.hero-window__link {
  display: flex;
  align-items: center;
  gap: 0.35em;
  min-height: 44px;
  padding: 0 var(--space-md);
  border-top: 1px solid var(--color-rule-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-terminal-muted);
  text-decoration: none;
  transition: color var(--dur-short) var(--ease-out),
              background-color var(--dur-short) var(--ease-out);
}
.hero-window__link:hover {
  color: var(--color-terminal-accent);
  background: var(--color-terminal-bg-2);
}

/* ---------- Section head S2 — hanging ---------- */

.head-hang {
  padding-block: var(--space-3xl) var(--space-xl);
  max-width: 42rem;
  margin-inline: var(--page-gutter);
}
.head-hang h2 { font-size: var(--text-2xl); }
.section-intro {
  margin-top: var(--space-sm);
  color: var(--color-ink-2);
  max-width: 58ch;
}

/* ---------- Demo section: terminal, two tabs ---------- */

.demo-section { padding-block: var(--space-xl) var(--space-2xl); }

.terminal {
  margin-inline: var(--page-gutter);
  border: 1px solid var(--color-rule-2);
  background: var(--color-terminal-bg);
}

.terminal__tabs {
  display: flex;
  border-bottom: 1px solid var(--color-rule-2);
  overflow-x: auto;
}

.terminal__tab {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-terminal-muted);
  background: transparent;
  border: none;
  border-right: 1px solid var(--color-rule-2);
  padding: var(--space-sm) var(--space-md);
  min-height: 44px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: color var(--dur-short) var(--ease-out),
              background-color var(--dur-short) var(--ease-out);
}
.terminal__tab:hover { color: var(--color-terminal-ink); }
.terminal__tab:active { transform: translateY(1px); }
.terminal__tab.is-active {
  color: var(--color-terminal-accent);
  background: var(--color-terminal-bg-2);
}

.terminal__body { position: relative; }

.terminal__panel {
  margin: 0;
  padding: var(--space-lg);
  color: var(--color-terminal-ink);
  font-size: var(--text-sm);
  line-height: 1.7;
  min-height: 16rem;
  max-height: 22rem;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.terminal__panel[hidden] { display: none; }

.terminal__caret {
  display: inline-block;
  width: 0.55em;
  background: var(--color-terminal-accent);
  animation: blink 1s steps(2) infinite;
}
@media (prefers-reduced-motion: reduce) {
  .terminal__caret { animation: none; opacity: 1; }
}
@keyframes blink { 50% { opacity: 0; } }

.terminal__caption {
  margin-top: var(--space-sm);
  margin-inline: var(--page-gutter);
  font-size: var(--text-xs);
  color: var(--color-neutral);
  max-width: 58ch;
}
.terminal__caption code {
  font-size: 0.95em;
  background: var(--color-paper-2);
  padding: 0.05em 0.35em;
}

/* ---------- Section head — rule-topped, single column ----------
 * (Not S1 left-margin-numbered: an eyebrow beside a heading in a
 * second column is gate-54-banned regardless of archetype name. An
 * eyebrow atop the heading, single column, is the compliant form.) */

.head-rule {
  border-top: 1px solid var(--color-rule);
  padding-block: var(--space-lg) var(--space-lg);
  margin-inline: var(--page-gutter);
  margin-top: var(--space-2xl);
}
.head-rule h2 { font-size: var(--text-2xl); }

/* ---------- Commands — F3 tabular spec sheet ---------- */

.commands-section { padding-block: 0 var(--space-2xl); }

.spec-sheet {
  width: calc(100% - 2 * var(--page-gutter));
  margin-inline: var(--page-gutter);
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.spec-sheet th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-neutral);
  font-weight: 400;
  padding-block: var(--space-sm);
  border-bottom: 1px solid var(--color-rule-2);
}
.spec-sheet td {
  padding-block: var(--space-sm);
  border-bottom: 1px solid var(--color-rule);
  vertical-align: top;
}
.spec-sheet td:first-child { white-space: nowrap; padding-right: var(--space-md); }
.spec-sheet code {
  font-size: 0.9em;
  background: var(--color-paper-2);
  padding: 0.05em 0.35em;
}

/* ---------- Credits — S4 inline + T1 pull-quote with marginalia ---------- */

.credits-section {
  margin-inline: var(--page-gutter);
  max-width: 42rem;
}

.inline-head {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-neutral);
  margin-bottom: var(--space-lg);
}

.proof-margin {
  display: grid;
  grid-template-columns: 1fr 14rem;
  gap: var(--space-xl);
  align-items: start;
}
.quote {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  font-style: normal;
  line-height: 1.3;
}
.attribution { margin-top: var(--space-md); font-size: var(--text-sm); }
.attribution a { text-decoration: underline; }
.aside-note {
  font-size: var(--text-sm);
  color: var(--color-neutral);
  padding-top: var(--space-xs);
  border-top: 1px solid var(--color-rule);
}

/* ---------- Sticky CTA (C4) ---------- */

.sticky-cta {
  position: sticky;
  bottom: var(--space-md);
  display: flex;
  justify-content: flex-end;
  margin-inline: var(--page-gutter);
  pointer-events: none;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--dur-short) var(--ease-out),
              transform var(--dur-short) var(--ease-out);
}
.sticky-cta.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.sticky-cta .link {
  margin: 0;
  background: var(--color-paper);
  border: 1px solid var(--color-rule-2);
  padding: var(--space-sm) var(--space-lg);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  box-shadow: var(--shadow-whisper);
}

/* ---------- Footer Ft4 — dense typographic colophon ---------- */

.foot-dense {
  padding: var(--space-2xl) var(--page-gutter) var(--space-2xl);
  border-top: 1px solid var(--color-rule);
  font-size: var(--text-xs);
  color: var(--color-neutral);
  line-height: 1.7;
}
.foot-dense a { text-decoration: underline; }
.foot-dense p { max-width: 68ch; }

/* ---------- Page-load reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(8px);
  animation: reveal var(--dur-long) var(--ease-out) forwards;
  animation-delay: calc(var(--i, 0) * 60ms);
}
@keyframes reveal { to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  .reveal { animation: reveal-reduced 150ms linear forwards; }
  @keyframes reveal-reduced { to { opacity: 1; transform: none; } }
  .sticky-cta { transition: opacity 150ms linear; transform: none; }
}

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

@media (max-width: 40rem) {
  .proof-margin {
    grid-template-columns: 1fr;
  }
  .terminal__panel { max-height: 18rem; }
}

@media (min-width: 60rem) {
  .hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 22rem);
    align-items: center;
    margin-inline: max(var(--page-gutter), calc((100% - 64rem) / 2 + var(--page-gutter)));
  }
}