/* Hallmark · pre-emit critique: P5 H5 E4 S5 R4 V5
 * Hallmark · genre: atmospheric · macrostructure: Narrative Workflow · theme: Terminal
 * tone: technical/utilitarian · anchor hue: 148 (phosphor) · enrichment: Tier-A CSS loop diagram
 * nav: N8 terminal command · footer: Ft5 statement
 * contrast: pass (40–41) · slop: pass (42–45) · honest: pass (46) · chrome: pass (47)
 * tokens: pass (48) · responsive: pass (49) · mobile: pass (34, 50–57)
 */

@import url("tokens.css");

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

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

html {
  overflow-x: clip;
  -webkit-text-size-adjust: 100%;
}

body {
  overflow-x: clip;
  margin: 0;
  background: var(--color-paper);
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.6;
  padding-inline: max(0px, env(safe-area-inset-left));
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-style: normal;
  color: var(--color-ink);
  letter-spacing: -0.03em;
  line-height: 1.1;
  overflow-wrap: anywhere;
  min-width: 0;
  margin: 0;
}

p {
  margin: 0;
  max-width: var(--measure);
}

/* Only 400 and 600 of the body face are loaded; never let 700 synthesise. */
strong {
  font-weight: 600;
  color: var(--color-ink);
}

ol,
ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: var(--color-ink);
  text-decoration-color: var(--color-accent-dim);
  text-underline-offset: 3px;
  transition: color var(--dur-micro) var(--ease-out),
    text-decoration-color var(--dur-micro) var(--ease-out);
}

a:hover {
  color: var(--color-accent);
  text-decoration-color: var(--color-accent);
}

a:active {
  color: var(--color-accent-dim);
}

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

figure {
  margin: 0;
}

/* Shared ------------------------------------------------------------- */

.wrap {
  max-width: 78rem;
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

/* Grid and flex children default to min-width:auto, so a wide table or a long
   command line would push the page past the viewport instead of scrolling
   inside its own container. */
.hero > *,
.stages > *,
.stage > *,
.stage__body > *,
.block > *,
.rewrite > *,
.compare > *,
.foot-stmt > *,
.shot > *,
.term,
.sheet-scroll {
  min-width: 0;
}

.section__title {
  font-size: var(--text-display-s);
  max-width: 22ch;
}

.lede {
  font-size: var(--text-md);
  line-height: 1.5;
  color: var(--color-muted);
}

.muted {
  color: var(--color-neutral);
}

.skip {
  position: absolute;
  left: -9999px;
}

.skip:focus {
  left: var(--page-gutter);
  top: var(--space-xs);
  z-index: var(--z-sticky);
  background: var(--color-paper-2);
  color: var(--color-ink);
  padding: var(--space-xs) var(--space-sm);
}

/* N8 · Terminal command nav ------------------------------------------ */

.nav-term {
  border-bottom: var(--rule-hair) solid var(--color-rule);
  background: var(--color-paper);
}

.nav-term__line {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  margin: 0;
  padding-block: var(--space-sm);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 1ch;
  max-width: 78rem;
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

.nav-term__prompt {
  color: var(--color-accent);
}

.nav-term__name {
  color: var(--color-ink);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-term__line a {
  color: var(--color-muted);
  white-space: nowrap;
  text-decoration: underline;
}

.caret {
  display: inline-block;
  width: 1ch;
  color: var(--color-accent);
  animation: blink 1.05s steps(2) infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

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

.hero {
  padding-block: clamp(var(--space-xl), 6vw, var(--space-2xl)) var(--space-3xl);
  display: grid;
  gap: var(--space-xl);
}

.hero__head {
  display: grid;
  gap: var(--space-lg);
  max-width: 46rem;
}

.hero__title {
  font-size: var(--text-display);
}

.hero__title em {
  font-style: normal;
  color: var(--color-accent);
}

.hero__deck {
  font-size: var(--text-md);
  line-height: 1.5;
  max-width: 54ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-xl);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  padding-top: var(--space-2xs);
}

/* C3 · typographic links, no boxes */
.link-cta {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--rule-thick) solid var(--color-accent-dim);
  padding-bottom: var(--space-3xs);
  white-space: nowrap;
  transition: border-color var(--dur-micro) var(--ease-out);
}

.link-cta:hover {
  border-color: var(--color-accent);
}

.link-cta:active {
  border-color: var(--color-accent-dim);
}

.link-cta--quiet {
  color: var(--color-muted);
  border-color: var(--color-rule);
}

.link-cta--quiet:hover {
  color: var(--color-ink);
}

/* Loop diagram — Tier A, hand-built ---------------------------------- */

.loop {
  border-top: var(--rule-hair) solid var(--color-rule);
  padding-top: var(--space-lg);
}

.loop__track {
  display: grid;
  gap: var(--space-md);
}

.loop__node {
  position: relative;
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  display: grid;
  gap: var(--space-2xs);
  align-content: start;
}

.loop__node::after {
  content: "↓";
  position: absolute;
  inset-block-end: calc(var(--space-md) * -1);
  inset-inline-start: 50%;
  transform: translate(-50%, 2px);
  z-index: var(--z-raised);
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: var(--text-md);
  line-height: 1;
}

.loop__node:last-child::after {
  content: none;
}

/* Lowercase: the labels read as CLI output, not as editorial eyebrows. */
.loop__who {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-neutral);
}

.loop__act {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: -0.02em;
}

/* Same size as the label above it; the hierarchy is carried by lightness. */
.loop__how {
  font-size: var(--text-sm);
  color: var(--color-muted);
}

.loop__node--live .loop__act {
  color: var(--color-accent);
}

.loop__return {
  position: relative;
  max-width: none;
  margin-block-start: var(--space-lg);
  height: var(--space-xl);
  border: var(--rule-hair) dashed var(--color-rule);
  border-block-start: 0;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.loop__return span {
  position: absolute;
  inset-block-end: 0;
  inset-inline-start: 50%;
  transform: translate(-50%, 50%);
  background: var(--color-paper);
  padding-inline: 1ch;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-neutral);
  white-space: nowrap;
}

.loop__cap {
  margin-block-start: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-neutral);
}

.loop__return::before {
  content: "◀";
  position: absolute;
  inset-block-end: 0;
  inset-inline-start: 0;
  transform: translate(-1px, 50%);
  color: var(--color-accent);
  font-size: var(--text-sm);
  line-height: 1;
}

@media (min-width: 60rem) {
  .loop__track {
    grid-auto-flow: column;
    grid-auto-columns: minmax(0, 1fr);
    gap: var(--space-xl);
  }

  .loop__node::after {
    content: "→";
    inset-block-end: auto;
    inset-block-start: 50%;
    inset-inline-start: auto;
    inset-inline-end: calc(var(--space-xl) * -0.5);
    transform: translate(50%, -50%);
  }
}

/* Stages — Narrative Workflow ---------------------------------------- */

.stages {
  padding-block: var(--space-md) var(--space-2xl);
}

.stage {
  border-top: var(--rule-thick) solid var(--color-rule);
  padding-block: var(--space-xl) var(--space-2xl);
  display: grid;
  gap: var(--space-lg);
}

.stage:last-child {
  padding-block-end: var(--space-xl);
}

.stage__title {
  font-size: var(--text-display-s);
}

.stage__title .num {
  color: var(--color-accent);
  padding-inline-end: 1ch;
  font-variant-numeric: tabular-nums;
}

.stage__body {
  display: grid;
  gap: var(--space-md);
  max-width: var(--measure);
}

.keycap {
  font-family: var(--font-display);
  font-size: 0.9em;
  color: var(--color-ink);
  background: var(--color-paper-3);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-sm);
  padding: var(--space-3xs) 0.5ch;
  white-space: nowrap;
}

code {
  font-family: var(--font-code);
  font-size: 0.9em;
  color: var(--color-ink);
}

/* Wide screens indent the body away from the stage heading — asymmetry
   without putting the stage number in a left margin beside the title. */
@media (min-width: 60rem) {
  .stage__body {
    margin-inline-start: var(--space-3xl);
  }

  .stage--wide .stage__body {
    margin-inline-start: 0;
    max-width: none;
  }
}

/* Figure — real screenshot, hairline frame, no fake chrome ----------- */

.shot {
  display: grid;
  gap: var(--space-sm);
  margin-block-start: var(--space-md);
}

.shot img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-sm);
}

.shot figcaption {
  font-size: var(--text-sm);
  color: var(--color-neutral);
  max-width: 60ch;
}

/* Code blocks — typographic frame, no window chrome ------------------ */

.term {
  margin-block-start: var(--space-lg);
  border-top: var(--rule-hair) solid var(--color-rule);
  border-bottom: var(--rule-hair) solid var(--color-rule);
  background: var(--color-paper-2);
}

.term__label {
  max-width: none;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-neutral);
  padding: var(--space-xs) var(--space-md);
  border-bottom: var(--rule-hair) solid var(--color-rule);
}

.term pre {
  margin: 0;
  padding: var(--space-md);
  overflow-x: auto;
  font-family: var(--font-code);
  font-size: var(--text-sm);
  line-height: 1.85;
  color: var(--color-ink);
}

.term .p {
  color: var(--color-accent);
  user-select: none;
}

.term .c {
  color: var(--color-neutral);
}

/* Spec sheet — F3 ---------------------------------------------------- */

.rewrite {
  padding-block: var(--space-2xl) var(--space-3xl);
  border-top: var(--rule-thick) solid var(--color-rule);
  display: grid;
  gap: var(--space-lg);
}

.sheet-scroll {
  overflow-x: auto;
  margin-block-start: var(--space-2xs);
}

/* Narrow viewports scroll the tables sideways; say so rather than letting the
   first column look like the whole table. */
.scroll-hint {
  margin-block-start: var(--space-md);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-accent-dim);
}

@media (min-width: 60rem) {
  .scroll-hint {
    display: none;
  }
}

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 34rem;
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
  text-align: left;
}

th,
td {
  border-bottom: var(--rule-hair) solid var(--color-rule);
  padding: var(--space-sm) var(--space-md) var(--space-sm) 0;
  vertical-align: top;
}

thead th {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-neutral);
}

tbody th {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-ink);
  white-space: nowrap;
}

.state--signal {
  color: var(--color-signal);
}

/* Comparison --------------------------------------------------------- */

.compare {
  padding-block: var(--space-2xl) var(--space-3xl);
  border-top: var(--rule-thick) solid var(--color-rule);
  display: grid;
  gap: var(--space-lg);
}

.compare table {
  min-width: 40rem;
}

.compare td {
  color: var(--color-neutral);
}

.compare .y {
  color: var(--color-accent);
  font-family: var(--font-display);
}

.compare .n {
  color: var(--color-neutral);
  font-family: var(--font-display);
}

.compare tbody th {
  white-space: normal;
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-muted);
  min-width: 14rem;
  padding-inline-end: var(--space-lg);
}

.compare thead th:first-child {
  min-width: 14rem;
}

.nongoals {
  max-width: var(--measure);
  border-left: var(--rule-thick) solid var(--color-rule);
  padding-left: var(--space-md);
  margin-block-start: var(--space-md);
}

/* Contract · install ------------------------------------------------- */

.block {
  padding-block: var(--space-2xl) var(--space-3xl);
  border-top: var(--rule-thick) solid var(--color-rule);
  display: grid;
  gap: var(--space-lg);
}

/* Uneven rhythm: the install block sits tighter than its neighbours. */
#install {
  padding-block: var(--space-xl) var(--space-2xl);
}

/* Ft5 · Statement footer --------------------------------------------- */

.foot-stmt {
  border-top: var(--rule-thick) solid var(--color-accent-dim);
  padding-block: var(--space-2xl) var(--space-xl);
  display: grid;
  gap: var(--space-xl);
}

.foot-stmt__line {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-ink);
  font-size: var(--text-display-s);
  line-height: 1.15;
  letter-spacing: -0.03em;
  max-width: 24ch;
}

.foot-stmt__meta {
  max-width: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
  justify-content: space-between;
  align-items: baseline;
  padding-block-start: var(--space-md);
  border-top: var(--rule-hair) solid var(--color-rule);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-neutral);
}

.foot-stmt__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
}

.foot-stmt__meta a {
  white-space: nowrap;
}

/* One orchestrated entrance ------------------------------------------ */

.reveal {
  opacity: 0;
  transform: translateY(8px);
  animation: reveal var(--dur-long) var(--ease-out) forwards;
  animation-delay: calc(var(--i, 0) * 70ms);
}

@keyframes reveal {
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 150ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 150ms !important;
  }

  .caret {
    animation: none;
    opacity: 1;
  }

  .reveal {
    transform: none;
  }
}

@media (pointer: coarse) {
  .nav-term__line a,
  .link-cta {
    padding-block: var(--space-2xs);
  }
}