/* ClisTa Protocol — site layout + components
   Translated from the design system's React primitives and the
   marketing / terminal UI kits. Visual output matches the prototypes;
   structure is plain semantic HTML/CSS. */

/* ============================================================
   Primitives
   ============================================================ */

/* ---- Button ------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 16px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.005em;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  transition: background var(--dur-fast) var(--ease-standard),
              border-color var(--dur-fast) var(--ease-standard),
              color var(--dur-fast) var(--ease-standard);
}
.btn:active { transform: translateY(0.5px); }
.btn svg { display: block; flex: none; }

.btn--sm { height: 32px; padding: 0 12px; font-size: 13px; gap: 6px; }
.btn--lg { height: 48px; padding: 0 22px; font-size: 15px; gap: 9px; }

.btn--primary {
  background: var(--ink-950);
  color: var(--paper);
  border-color: var(--ink-950);
}
.btn--primary:hover { background: var(--ink-800); border-color: var(--ink-800); }

.btn--secondary {
  background: var(--paper);
  color: var(--ink-950);
  border-color: var(--ink-950);
}
.btn--secondary:hover { background: var(--ink-50); }

.btn--ghost {
  background: transparent;
  color: var(--ink-950);
  border-color: transparent;
}
.btn--ghost:hover { background: var(--ink-100); }

/* Inverse secondary (on dark sections) */
.btn--ondark {
  background: transparent;
  color: var(--paper);
  border-color: #3a3a42;
}
.btn--ondark:hover { background: rgba(255,255,255,0.06); }

/* ---- Badge -------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 22px;
  padding: 0 9px;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1;
  white-space: nowrap;
  border: 1px solid transparent;
}
.badge--mono { font-family: var(--font-mono); font-size: 12px; font-weight: 500; letter-spacing: 0; }
.badge__dot { width: 6px; height: 6px; border-radius: 50%; flex: none; }

/* tones — soft (default) */
.badge--neutral  { background: var(--ink-100); color: var(--ink-700); }
.badge--verified { background: var(--verified-tint); color: #185c3a; }
.badge--evidence { background: var(--evidence-tint); color: #1f478f; }
.badge--degraded { background: var(--degraded-tint); color: #7a540e; }
.badge--failed   { background: var(--failed-tint); color: #8c2c26; }

.badge--neutral  .badge__dot { background: var(--ink-950); }
.badge--verified .badge__dot { background: var(--verified); }
.badge--evidence .badge__dot { background: var(--evidence); }
.badge--degraded .badge__dot { background: var(--degraded); }
.badge--failed   .badge__dot { background: var(--failed); }

/* outline variant */
.badge--outline { background: transparent; }
.badge--outline.badge--neutral  { color: var(--ink-700); border-color: var(--ink-200); }
.badge--outline.badge--verified { color: #185c3a; border-color: #bfe0cd; }
.badge--outline.badge--evidence { color: #1f478f; border-color: #c2d3ee; }
.badge--outline.badge--degraded { color: #7a540e; border-color: #e6d3a8; }
.badge--outline.badge--failed   { color: #8c2c26; border-color: #e8c4c1; }

/* ---- Card --------------------------------------------------- */
.card {
  background: var(--bg-surface);
  color: var(--text-body);
  border: 1px solid var(--border-hair);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}
.card--lg { padding: var(--space-8); }

/* ---- NumberedStep ------------------------------------------- */
.step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex: none;
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
  color: var(--paper);
}
.step--ink      { background: var(--ink-950); }
.step--verified { background: var(--verified); }
.step--failed   { background: var(--failed); }
.step--outline  { background: transparent; color: var(--ink-950); border-color: var(--ink-950); }

/* ---- Terminal window ---------------------------------------- */
.terminal {
  background: var(--term-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-inverse);
  box-shadow: var(--shadow-term);
  overflow: hidden;
}
.terminal__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-inverse);
}
.terminal__lights { display: flex; gap: 6px; }
.terminal__lights i {
  width: 10px; height: 10px; border-radius: 50%;
  background: transparent; border: 1px solid #3a3a42; display: inline-block;
}
.terminal__title {
  margin-left: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--term-dim);
  letter-spacing: 0.02em;
}
.terminal__body {
  padding: 16px 18px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  line-height: var(--lh-mono);
  color: var(--term-fg);
}
.t-line { display: flex; gap: 8px; white-space: pre-wrap; word-break: break-word; }
.t-line__prompt { color: var(--term-dim); flex: none; }
.t-line__glyph  { flex: none; }
.t-gap { height: 0.7em; }
.t-green { color: var(--term-green); }
.t-blue  { color: var(--term-blue); }
.t-amber { color: var(--term-amber); }
.t-red   { color: var(--term-red); }
.t-dim   { color: var(--term-dim); }
.t-fg    { color: var(--term-fg); }

/* ============================================================
   Marketing page
   ============================================================ */
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 32px; }

a.plain { text-decoration: none; }
a.plain:hover { opacity: 0.7; }

/* ---- Header ------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-hair);
}
.site-header__inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { width: 30px; height: 30px; }
.brand__word {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 22px;
  letter-spacing: 0.02em;
  color: var(--ink-950);
}
.brand__tag { font-size: 10px; margin-top: 3px; }
.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav a.navlink { font-size: 14px; color: var(--text-muted); font-weight: 500; }
.site-nav a.navlink:hover { color: var(--ink-950); }

/* ---- Hero --------------------------------------------------- */
.hero { padding-top: 76px; padding-bottom: 72px; }
.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero h1 { font-size: 60px; margin-top: 18px; color: var(--ink-950); }
.lede {
  font-size: 19px;
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 62ch;
}
.hero .lede { margin-top: 22px; }
.hero__actions { display: flex; gap: 12px; margin-top: 30px; flex-wrap: wrap; }
.hero__meta { display: flex; gap: 18px; margin-top: 26px; align-items: center; flex-wrap: wrap; }
.hero__commits { font-size: 13px; color: var(--text-faint); font-family: var(--font-mono); }

/* ---- Section helpers ---------------------------------------- */
.section { padding: 88px 0; }
.h2 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 34px;
  letter-spacing: -0.01em;
  color: var(--text-strong);
  line-height: 1.18;
}

/* ---- Core law (dark band) ----------------------------------- */
.coreLaw { background: var(--ink-950); padding: 72px 0; }
.coreLaw .wrap { text-align: center; }
.coreLaw__display {
  font-family: var(--font-display);
  font-weight: var(--fw-light);
  letter-spacing: var(--ls-display);
  font-size: 44px;
  color: var(--paper);
  margin-top: 18px;
  line-height: 1.15;
}
.coreLaw__flow { max-width: 620px; margin: 28px auto 0; }
.coreLaw__flow p { font-size: 16px; line-height: 1.65; color: var(--ink-300); }
.coreLaw__flow code { font-family: var(--font-mono); color: var(--ink-200); }

/* ---- Scenario ----------------------------------------------- */
.scenario__head { max-width: 720px; }
.scenario__head .h2 { margin-top: 14px; }
.scenario__head .lede { margin-top: 16px; }
.facet-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 38px;
}
.facet__top { display: flex; align-items: center; justify-content: space-between; }
.facet__k { font-size: 11px; }
.facet p { font-size: 14.5px; line-height: 1.55; color: var(--text-body); margin-top: 14px; }

/* ---- Spine -------------------------------------------------- */
.spine {
  background: var(--ink-50);
  border-top: 1px solid var(--border-hair);
  border-bottom: 1px solid var(--border-hair);
}
.spine__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}
.spine__intro .h2 { margin-top: 14px; }
.spine__intro .lede { margin-top: 16px; }
.spine__intro code.inline {
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--paper);
  border: 1px solid var(--border-hair);
  border-radius: 4px;
  padding: 1px 6px;
}
.spine__intro .badge { margin-top: 24px; }
.spine__table {
  background: var(--paper);
  border: 1px solid var(--border-hair);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.spine__row {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 16px;
  padding: 16px 20px;
  align-items: baseline;
  border-top: 1px solid var(--border-faint);
}
.spine__row:first-child { border-top: none; }
.spine__layer { font-size: 14px; font-weight: 600; color: var(--text-strong); }
.spine__cmd { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-faint); display: block; }
.spine__proves { font-size: 14px; line-height: 1.5; color: var(--text-muted); }

/* ---- Lived proof / loop ------------------------------------- */
.proof { text-align: center; }
.proof .h2 { margin: 14px auto 0; max-width: 700px; }
.loop {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 0;
  margin-top: 46px;
  flex-wrap: wrap;
}
.loop__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: 200px;
}
.loop__node p { font-size: 15px; line-height: 1.45; color: var(--text-body); }
.loop__link {
  width: 56px;
  align-self: flex-start;
  margin-top: 19px;
  border-top: 1.5px dotted var(--ink-300);
}

/* ---- Gate (dark) -------------------------------------------- */
.gate { background: var(--ink-950); padding: 84px 0; }
.gate__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.gate__copy .h2 { color: var(--paper); margin-top: 14px; }
.gate__copy p { font-size: 17px; line-height: 1.62; color: var(--ink-300); margin-top: 18px; }
.gate__copy p strong { color: var(--paper); }
.gate__cta { display: flex; gap: 12px; margin-top: 26px; }
.gate__note { display: flex; gap: 14px; margin-top: 22px; align-items: center; }
.gate__note svg { color: var(--ink-400); }
.gate__note span { font-family: var(--font-mono); font-size: 13px; color: var(--ink-400); }
.gate__panel {
  background: var(--ink-900);
  border: 1px solid var(--border-inverse);
  border-radius: var(--radius-lg);
  padding: 30px;
}
.gate__panel > .cl-eyebrow { color: var(--ink-400); }
.gate__list { margin-top: 18px; display: flex; flex-direction: column; gap: 14px; }
.gate__item { display: flex; gap: 12px; align-items: flex-start; }
.gate__item svg { color: var(--term-red); margin-top: 2px; flex: none; }
.gate__item span { font-size: 14.5px; line-height: 1.5; color: var(--ink-200); }
.gate__panel-foot { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--border-inverse); }

/* ---- Footer ------------------------------------------------- */
.site-footer { max-width: 1120px; margin: 0 auto; padding: 56px 32px 64px; }
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  margin-top: 44px;
}
.footer__brand { display: flex; align-items: center; gap: 12px; }
.footer__brand img { width: 34px; height: 34px; }
.footer__brand span { font-family: var(--font-display); font-weight: 400; font-size: 24px; letter-spacing: 0.02em; }
.footer__desc { font-size: 13.5px; line-height: 1.6; color: var(--text-faint); margin-top: 16px; max-width: 34ch; }
.footer__col .cl-eyebrow { font-size: 11px; }
.footer__links { margin-top: 14px; display: flex; flex-direction: column; gap: 10px; }
.footer__links a { font-size: 14px; color: var(--text-muted); }
.footer__links a:hover { color: var(--ink-950); text-decoration: underline; text-underline-offset: 2px; }
.footer__legal { margin-top: 40px; font-family: var(--font-mono); font-size: 12px; color: var(--text-faint); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .hero__grid,
  .spine__grid,
  .gate__grid { grid-template-columns: 1fr; gap: 40px; }
  .facet-grid { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 48px; }
  .coreLaw__display { font-size: 34px; }
  .site-nav a.navlink { display: none; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 20px; }
  .facet-grid,
  .footer__grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 40px; }
  .h2 { font-size: 28px; }
  .loop__link { display: none; }
}

/* ============================================================
   Shared surface primitives (gate · runs · docs · learn)
   ============================================================ */

/* ---- IconMedallion ------------------------------------------ */
.medallion {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  flex: none;
  border-radius: 50%;
  border: 1px solid var(--border-hair);
  background: var(--paper);
  color: var(--ink-950);
}
.medallion svg { display: block; width: 21px; height: 21px; }
.medallion--strong { border-color: var(--ink-950); background: var(--ink-950); color: var(--paper); }
.medallion--verified { border-color: #bfe0cd; background: var(--verified-tint); color: var(--verified); }
.medallion--failed   { border-color: #e8c4c1; background: var(--failed-tint); color: var(--failed); }

/* ---- Generic page hero -------------------------------------- */
.page-hero { padding: 72px 0 8px; }
.page-hero h1 { font-size: 48px; margin-top: 16px; color: var(--ink-950); }
.page-hero .lede { margin-top: 20px; }

/* ---- Dark panel (reusable; gate "does not claim", etc.) ----- */
.panel-dark {
  background: var(--ink-900);
  border: 1px solid var(--border-inverse);
  border-radius: var(--radius-lg);
  padding: 30px;
}
.panel-dark .cl-eyebrow { color: var(--ink-400); }

/* ---- Key/value terms list ----------------------------------- */
.terms {
  border: 1px solid var(--border-hair);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--paper);
}
.terms__row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
  padding: 18px 22px;
  border-top: 1px solid var(--border-faint);
  align-items: baseline;
}
.terms__row:first-child { border-top: none; }
.terms__k {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--text-muted);
}
.terms__v { font-size: 15px; line-height: 1.55; color: var(--text-body); }
.terms__v strong { color: var(--text-strong); }
.terms__v code { font-family: var(--font-mono); font-size: 13.5px; }

/* ---- Countdown ---------------------------------------------- */
.countdown {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--font-mono);
  color: var(--text-strong);
}
.countdown__num { font-size: 40px; font-weight: 600; letter-spacing: -0.02em; }
.countdown__unit { font-size: 13px; color: var(--text-muted); }

/* ---- Vertical numbered steps (submission, ladder) ----------- */
.steps { display: flex; flex-direction: column; gap: 0; }
.steps__item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--border-faint);
}
.steps__item:first-child { border-top: none; }
.steps__body h3 { font-size: 17px; font-weight: 600; color: var(--text-strong); }
.steps__body p { font-size: 15px; line-height: 1.55; color: var(--text-muted); margin-top: 6px; }
.steps__body code { font-family: var(--font-mono); font-size: 13.5px; background: var(--ink-100); border-radius: 4px; padding: 1px 6px; }

/* ---- Ledger table (runs) ------------------------------------ */
.ledger {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--border-hair);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--paper);
  font-size: 14px;
}
.ledger thead th {
  text-align: left;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-hair);
}
.ledger tbody td { padding: 14px 18px; border-top: 1px solid var(--border-faint); color: var(--text-body); }
.ledger tbody td.mono { font-family: var(--font-mono); font-size: 13px; color: var(--text-muted); }
.ledger__empty {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}
.ledger__empty .big { font-family: var(--font-mono); font-size: 22px; color: var(--text-strong); }
.ledger__empty p { margin-top: 10px; font-size: 14px; }

/* ---- Callout / notice --------------------------------------- */
.callout {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  border: 1px solid var(--border-hair);
  border-left: 3px solid var(--ink-950);
  border-radius: var(--radius-md);
  background: var(--paper);
  padding: 16px 20px;
}
.callout svg { flex: none; color: var(--ink-950); margin-top: 2px; }
.callout p { font-size: 14px; line-height: 1.55; color: var(--text-body); }
.callout p a { text-decoration: underline; text-underline-offset: 2px; }

/* ---- Rung cards (learn) ------------------------------------- */
.rungs { display: flex; flex-direction: column; gap: 18px; margin-top: 40px; }
.rung {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 22px;
  border: 1px solid var(--border-hair);
  border-radius: var(--radius-lg);
  background: var(--paper);
  padding: 26px 28px;
}
.rung__meta { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.rung__time { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); text-align: center; }
.rung__head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.rung__title { font-size: 19px; font-weight: 600; color: var(--text-strong); }
.rung__body { font-size: 15px; line-height: 1.6; color: var(--text-muted); margin-top: 10px; }
.rung__body strong { color: var(--text-body); }
.rung__body code { font-family: var(--font-mono); font-size: 13.5px; background: var(--ink-100); border-radius: 4px; padding: 1px 6px; }
.rung__body ul { margin: 10px 0 0; padding-left: 20px; }
.rung__body li { margin: 4px 0; }

/* ---- Docs shell --------------------------------------------- */
.docs-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 56px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 48px 32px 96px;
  align-items: start;
}
.doc-nav { position: sticky; top: 88px; }
.doc-nav__group { margin-bottom: 26px; }
.doc-nav__links { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.doc-nav__links a { font-size: 14px; color: var(--text-muted); }
.doc-nav__links a:hover { color: var(--ink-950); }
.doc-article { max-width: 720px; }
.doc-article section { padding: 14px 0 34px; }
.doc-article h2 { font-size: 26px; margin-bottom: 14px; }
.doc-article h3 { font-size: 18px; margin: 26px 0 10px; }
.doc-article p { font-size: 16px; line-height: 1.65; color: var(--text-body); margin: 12px 0; }
.doc-article p code,
.doc-article li code { font-family: var(--font-mono); font-size: 14px; background: var(--ink-100); border-radius: 4px; padding: 1px 6px; }
.doc-article ul { margin: 12px 0; padding-left: 22px; }
.doc-article li { font-size: 16px; line-height: 1.6; color: var(--text-body); margin: 6px 0; }
.doc-vocab { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 16px; }
.doc-vocab dt { font-family: var(--font-display); font-size: 12px; font-weight: 500; letter-spacing: var(--ls-eyebrow); text-transform: uppercase; color: var(--text-strong); }
.doc-vocab dd { margin: 4px 0 0; font-size: 14px; line-height: 1.5; color: var(--text-muted); }

@media (max-width: 860px) {
  .docs-layout { grid-template-columns: 1fr; gap: 28px; }
  .doc-nav { position: static; }
  .doc-vocab { grid-template-columns: 1fr; }
  .terms__row { grid-template-columns: 1fr; gap: 6px; }
  .page-hero h1 { font-size: 38px; }
}

/* ---- Global nav active state (driven by <body data-surface>) ------ */
body[data-surface="home"]  .site-nav a[data-nav="home"],
body[data-surface="cli"]   .site-nav a[data-nav="cli"],
body[data-surface="docs"]  .site-nav a[data-nav="docs"],
body[data-surface="gate"]  .site-nav a[data-nav="gate"],
body[data-surface="learn"] .site-nav a[data-nav="learn"] {
  color: var(--ink-950);
  font-weight: 600;
}