/* SIGN site styles.
   Every value comes from five-deep.css (Five Deep token file) or the scales in
   TEN-CH-DESIGN-038. Do not add colors, sizes or spacing that are not tokens. */

@font-face {
  font-family: "Plus Jakarta Sans";
  src: url("../fonts/PlusJakartaSans.woff2") format("woff2");
  font-weight: 400 800;
  font-display: swap;
}
@font-face {
  font-family: "Inter";
  src: url("../fonts/Inter.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("../fonts/JetBrainsMono.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
}

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

html { scroll-padding-top: var(--fd-header-height); }

body {
  margin: 0;
  background: var(--fd-surface-page);
  color: var(--fd-text-body);
  font-family: var(--fd-font-text);
  font-size: var(--fd-type-body-size);
  line-height: var(--fd-type-body-line);
  font-weight: var(--fd-type-body-weight);
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- Type ---------- */
h1, h2, h3 {
  font-family: var(--fd-font-family);
  color: var(--fd-text-primary);
  margin: 0;
}
.display-lg, .display-md, .display-sm { max-width: 900px; }
.display-lg {
  font-size: var(--fd-type-display-lg-size);
  line-height: var(--fd-type-display-lg-line);
  font-weight: var(--fd-type-display-lg-weight);
  letter-spacing: var(--fd-type-display-lg-tracking);
}
.display-md {
  font-size: var(--fd-type-display-md-size);
  line-height: var(--fd-type-display-md-line);
  font-weight: var(--fd-type-display-md-weight);
  letter-spacing: var(--fd-type-display-md-tracking);
}
.display-sm {
  font-size: var(--fd-type-display-sm-size);
  line-height: var(--fd-type-display-sm-line);
  font-weight: var(--fd-type-display-sm-weight);
  letter-spacing: var(--fd-type-display-sm-tracking);
}
/* Section headline: h2 step, no tracking (TEN-CH-DESIGN-034 RAMP). */
h2 {
  font-size: var(--fd-type-h2-size);
  line-height: var(--fd-type-h2-line);
  font-weight: var(--fd-type-h2-weight);
}
h3 {
  font-size: var(--fd-type-h3-size);
  line-height: var(--fd-type-h3-line);
  font-weight: var(--fd-type-h3-weight);
}
p { margin: 0; max-width: 820px; }
p + p { margin-top: var(--fd-space-16); }
.lede {
  font-size: var(--fd-type-body-lg-size);
  line-height: var(--fd-type-body-lg-line);
  margin-top: var(--fd-space-24);
}
.small, small {
  font-size: var(--fd-type-small-size);
  line-height: var(--fd-type-small-line);
}
.muted { color: var(--fd-text-secondary); }
[data-ground='dark'] { color: var(--fd-text-primary); }

.eyebrow {
  display: block;
  font-family: var(--fd-font-family);
  font-size: var(--fd-type-eyebrow-size);
  line-height: var(--fd-type-eyebrow-line);
  font-weight: var(--fd-type-eyebrow-weight);
  letter-spacing: var(--fd-type-eyebrow-tracking);
  text-transform: uppercase;
  color: var(--fd-accessible-green);
  margin-bottom: var(--fd-space-16);
}
[data-ground='dark'] .eyebrow { color: var(--fd-brand-human-green); }

/* ---------- Links ---------- */
a { color: var(--fd-text-link); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
.ext::after { content: " (opens GitHub)"; }

code, pre, kbd { font-family: var(--fd-font-code); }
:not(pre) > code {
  font-size: var(--fd-type-small-size);
  background: var(--fd-surface-raised);
  border: 1px solid var(--fd-border-decorative);
  border-radius: var(--fd-radius-sm);
  padding: 0 var(--fd-space-4);
  color: var(--fd-text-primary);
}
[data-ground='dark'] :not(pre) > code { color: var(--fd-text-primary); }

/* ---------- Layout ---------- */
/* 1280px of content; the gutters sit outside it (TEN-CH-DESIGN-038 CONTAINER-AND-MEASURE). */
.shell {
  max-width: calc(var(--fd-container-max) + 2 * var(--fd-gutter-page));
  margin: 0 auto;
  padding: 0 var(--fd-gutter-page);
}
section { padding: var(--fd-space-128) 0; }
section.tight { padding: var(--fd-space-96) 0; }
.paper { background: var(--fd-neutral-paper); }
[data-ground='dark'] { background: var(--fd-surface-page); }
.section-head { margin-bottom: var(--fd-space-48); }
.section-head p { margin-top: var(--fd-space-16); }

.grid { display: grid; gap: var(--fd-space-32); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ---------- Skip link ---------- */
.skip {
  position: absolute; left: var(--fd-space-16); top: -100px; z-index: 100;
  background: var(--fd-action-primary); color: var(--fd-action-primary-label);
  padding: var(--fd-space-12) var(--fd-space-16); border-radius: var(--fd-radius-sm);
}
.skip:focus { top: var(--fd-space-16); }

/* ---------- Header ---------- */
header.site {
  position: sticky; top: 0; z-index: 50;
  background: var(--fd-surface-page);
  border-bottom: 1px solid var(--fd-border-decorative);
  transition: box-shadow var(--fd-motion-base) var(--fd-easing-in);
}
header.site.scrolled { box-shadow: var(--fd-elevation-overlay); border-bottom-color: transparent; }
.navbar {
  display: flex; align-items: center; justify-content: space-between; gap: var(--fd-space-24);
  min-height: var(--fd-header-height);
}
/* Brand: Five Deep logo (as on fivedeep.ai), a divider, then the SIGN name. */
.brand { display: flex; align-items: center; gap: var(--fd-space-20); min-width: 0; }
.brandlink { display: inline-flex; align-items: center; min-height: var(--fd-target-min); }
.brandmark { height: var(--fd-header-logo-height); width: auto; }
.brand-divider { width: 1px; align-self: stretch; margin: var(--fd-space-20) 0; background: var(--fd-border-decorative); }
.sitename {
  display: inline-flex; align-items: center; gap: var(--fd-space-12);
  min-height: var(--fd-target-min);
  text-decoration: none; color: var(--fd-text-primary);
  font-family: var(--fd-font-family);
}
.sitename strong { font-size: var(--fd-type-h3-size); font-weight: 800; letter-spacing: -0.02em; }
.sitename span {
  font-family: var(--fd-font-text);
  font-size: var(--fd-type-small-size); line-height: var(--fd-type-small-line);
  font-weight: var(--fd-type-small-weight); color: var(--fd-text-secondary);
}
nav.primary ul { display: flex; align-items: center; gap: var(--fd-space-8); list-style: none; margin: 0; padding: 0; }
nav.primary a:not(.btn) {
  display: inline-flex; align-items: center; min-height: var(--fd-target-min);
  padding: 0 var(--fd-space-12);
  color: var(--fd-text-primary); text-decoration: none; font-weight: 600;
  font-family: var(--fd-font-family);
  font-size: var(--fd-type-small-size); line-height: var(--fd-type-small-line);
}
nav.primary a:not(.btn):hover { text-decoration: underline; }
nav.primary a[aria-current='page'] { text-decoration: underline; text-decoration-thickness: 2px; font-weight: 700; }
.menu-btn { display: none; }

/* ---------- Buttons (TEN-CH-DESIGN-038) ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--fd-space-8);
  height: 48px; padding: 0 var(--fd-space-24);
  border-radius: var(--fd-radius-sm); border: 1px solid transparent;
  font-family: var(--fd-font-family); font-size: var(--fd-type-body-size); line-height: var(--fd-type-body-line); font-weight: 600;
  text-decoration: none; cursor: pointer;
  transition: background-color var(--fd-motion-micro) var(--fd-easing-in), border-color var(--fd-motion-micro) var(--fd-easing-in);
}
.btn-sm { height: 44px; padding: 0 var(--fd-space-16); font-size: var(--fd-type-small-size); line-height: var(--fd-type-small-line); }
.btn-lg { height: 56px; padding: 0 var(--fd-space-32); font-size: var(--fd-type-body-lg-size); line-height: var(--fd-type-body-lg-line); }
.btn-primary { background: var(--fd-action-primary); color: var(--fd-action-primary-label); }
.btn-primary:hover { background: var(--fd-action-primary-hover); }
.btn-secondary { background: transparent; color: var(--fd-text-primary); border-color: var(--fd-border-strong); }
.btn-secondary:hover { background: var(--fd-surface-raised); }
[data-ground='dark'] .btn-secondary:hover { background: var(--fd-surface-overlay); }
.btn-accent { background: var(--fd-action-accent); color: var(--fd-action-accent-label); }
.btn-accent:hover { background: var(--fd-action-accent-hover); }
.btn-accent:active { background: var(--fd-action-accent-pressed); }
.btn:hover { text-decoration: none; }
.actions { display: flex; flex-wrap: wrap; gap: var(--fd-space-16); margin-top: var(--fd-space-40); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: var(--fd-space-128) 0;
  background-color: var(--fd-surface-page);
  background-image:
    linear-gradient(90deg, rgba(11,39,64,0.96) 0%, rgba(11,39,64,0.96) 45%, rgba(11,39,64,0.2) 100%),
    url("../img/wave-dark-2.webp");
  background-size: cover; background-position: center right;
}
.hero .lede { color: var(--fd-text-primary); }
.hero.compact { padding: var(--fd-space-96) 0; }

/* ---------- Cards (TEN-CH-DESIGN-040) ---------- */
.card {
  background: var(--fd-surface-page);
  border: 1px solid var(--fd-border-decorative);
  border-radius: var(--fd-radius-lg);
  padding: var(--fd-space-32);
}
.paper .card { background: var(--fd-neutral-white); }
[data-ground='dark'] .card { background: var(--fd-surface-raised); }
.card h3 { margin-bottom: var(--fd-space-12); }
a.card {
  display: flex; flex-direction: column; gap: var(--fd-space-12);
  text-decoration: none; color: var(--fd-text-body);
  /* Line color by design decision (2026-11-10), matching the static cards. This is below the
     3:1 interactive-boundary rule in TEN-CH-DESIGN-040 CARD; the hover state uses the strong border. */
  border-color: var(--fd-border-decorative);
  transition: box-shadow var(--fd-motion-micro) var(--fd-easing-in), border-color var(--fd-motion-micro) var(--fd-easing-in);
}
a.card:hover { box-shadow: var(--fd-elevation-raised); border-color: var(--fd-border-strong); }
a.card h3 { margin: 0; }
a.card .go {
  margin-top: auto; padding-top: var(--fd-space-16);
  color: var(--fd-text-link); font-weight: 600; text-decoration: underline; text-underline-offset: 3px;
}
a.card ul { margin: 0; padding-left: var(--fd-space-20); }

/* ---------- Stat block ---------- */
.stat { border-top: 1px solid var(--fd-border-decorative); padding-top: var(--fd-space-24); }
.stat .figure {
  font-family: var(--fd-font-family);
  font-size: var(--fd-type-display-sm-size); line-height: var(--fd-type-display-sm-line);
  font-weight: 700; letter-spacing: var(--fd-type-display-sm-tracking);
  color: var(--fd-text-primary); font-variant-numeric: tabular-nums;
}
.stat .label { margin-top: var(--fd-space-8); font-weight: 600; color: var(--fd-text-primary); }
.stat .context { margin-top: var(--fd-space-4); color: var(--fd-text-secondary); font-size: var(--fd-type-small-size); line-height: var(--fd-type-small-line); }

/* ---------- Path motif: one use per viewport, never behind text ---------- */
.path-rule { height: 4px; border: 0; margin: 0 0 var(--fd-space-48); width: 160px; background: var(--fd-gradient-path); border-radius: var(--fd-radius-pill); }

/* ---------- Tables (TEN-CH-DESIGN-040 comparison table) ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--fd-border-decorative); border-radius: var(--fd-radius-lg); }
table { width: 100%; border-collapse: collapse; font-size: var(--fd-type-small-size); line-height: var(--fd-type-small-line); }
th, td { text-align: left; vertical-align: top; padding: var(--fd-space-16) var(--fd-space-20); border-bottom: 1px solid var(--fd-border-decorative); }
caption { caption-side: bottom; text-align: left; padding: var(--fd-space-16) var(--fd-space-20); }
thead th { background: var(--fd-surface-raised); color: var(--fd-text-primary); font-weight: 600; }
tbody th { color: var(--fd-text-primary); font-weight: 600; white-space: nowrap; }
tbody tr:last-child > * { border-bottom: 0; }
tr.ours > * { background: var(--fd-feedback-tint-info); }

/* ---------- Code blocks ---------- */
pre {
  margin: var(--fd-space-16) 0 0;
  background: var(--fd-brand-midnight); color: var(--fd-neutral-white);
  border-radius: var(--fd-radius-md);
  padding: var(--fd-space-20) var(--fd-space-24);
  overflow-x: auto;
  font-size: var(--fd-type-small-size); line-height: var(--fd-type-small-line);
}
pre .c { color: var(--fd-slate-300); }
.codehead { display: flex; justify-content: space-between; align-items: center; gap: var(--fd-space-16); margin-top: var(--fd-space-16); }
.codehead + pre { margin-top: var(--fd-space-8); }
.copy {
  min-height: var(--fd-target-min); padding: 0 var(--fd-space-16);
  border: 1px solid var(--fd-border-interactive); border-radius: var(--fd-radius-sm);
  background: var(--fd-surface-page); color: var(--fd-text-primary);
  font: 600 var(--fd-type-small-size)/var(--fd-type-small-line) var(--fd-font-family); cursor: pointer;
}
.copy:hover { border-color: var(--fd-border-strong); }

/* ---------- Steps (onboarding flow) ---------- */
.steps-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: var(--fd-space-64); align-items: start; }
.step-nav { position: sticky; top: calc(var(--fd-header-height) + var(--fd-space-32)); }
.step-nav ol { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--fd-border-decorative); }
.step-nav a {
  display: flex; gap: var(--fd-space-12); align-items: center; min-height: var(--fd-target-min);
  padding: 0 var(--fd-space-16); margin-left: -1px; border-left: 4px solid transparent;
  color: var(--fd-text-secondary); text-decoration: none; font-size: var(--fd-type-small-size); font-weight: 500;
}
.step-nav a:hover { color: var(--fd-text-primary); text-decoration: underline; }
.step-nav a[aria-current='step'] { color: var(--fd-text-primary); font-weight: 700; border-left-color: var(--fd-action-primary); }
.step-nav .n { font-family: var(--fd-font-code); font-variant-numeric: tabular-nums; }
.step-nav .done .n::after { content: " ✓"; color: var(--fd-accessible-green); }

ol.steps { list-style: none; margin: 0; padding: 0; counter-reset: step; }
ol.steps > li { counter-increment: step; padding: 0 0 var(--fd-space-64); }
ol.steps > li + li { border-top: 1px solid var(--fd-border-decorative); padding-top: var(--fd-space-64); }
.step-label {
  display: inline-flex; align-items: center; gap: var(--fd-space-8);
  height: 24px; padding: 0 var(--fd-space-12); margin-bottom: var(--fd-space-16);
  border: 1px solid var(--fd-border-interactive); border-radius: var(--fd-radius-pill);
  font-size: var(--fd-type-eyebrow-size); font-weight: 700; color: var(--fd-text-primary);
}
ol.steps h2, ol.steps h3 { font-size: var(--fd-type-h2-size); line-height: var(--fd-type-h2-line); font-weight: var(--fd-type-h2-weight); margin-bottom: var(--fd-space-16); }
ol.steps ul, ol.steps ol { max-width: 820px; padding-left: var(--fd-space-24); margin: var(--fd-space-16) 0 0; }
ol.steps li li + li { margin-top: var(--fd-space-8); }
.check {
  display: flex; gap: var(--fd-space-12); align-items: center; min-height: var(--fd-target-min);
  margin-top: var(--fd-space-24); font-weight: 600; color: var(--fd-text-primary); cursor: pointer;
}
.check input { width: 24px; height: 24px; margin: 0; accent-color: var(--fd-action-primary); cursor: pointer; }

/* ---------- Inline alert ---------- */
.note {
  display: flex; gap: var(--fd-space-12);
  border: 1px solid var(--fd-border-decorative); border-left: 4px solid var(--fd-feedback-info);
  border-radius: var(--fd-radius-md); padding: var(--fd-space-16) var(--fd-space-20);
  margin-top: var(--fd-space-24); max-width: 820px; color: var(--fd-text-primary);
}
.note strong { white-space: nowrap; }

/* ---------- FAQ list ---------- */
dl.faq { margin: 0; max-width: 820px; }
dl.faq dt { font-family: var(--fd-font-family); font-weight: 600; font-size: var(--fd-type-body-lg-size); line-height: var(--fd-type-body-lg-line); color: var(--fd-text-primary); }
dl.faq dd { margin: var(--fd-space-8) 0 var(--fd-space-40); }

/* ---------- Footer ---------- */
/* Same structure as the fivedeep.ai footer: logo and blurb on top, four equal
   link columns, then a full-width rule and the legal line. */
footer.site { padding: var(--fd-space-64) 0 var(--fd-space-40); }
.foot-brand { margin-bottom: var(--fd-space-48); }
.footmark { height: var(--fd-header-logo-height); width: auto; margin-bottom: var(--fd-space-20); }
.foot-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--fd-space-32); }
.foot-grid h2 {
  font-size: var(--fd-type-eyebrow-size); line-height: var(--fd-type-eyebrow-line);
  font-weight: var(--fd-type-eyebrow-weight); letter-spacing: var(--fd-type-eyebrow-tracking);
  text-transform: uppercase; margin-bottom: var(--fd-space-8);
}
.foot-grid ul { list-style: none; margin: 0; padding: 0; }
.foot-grid li a {
  display: inline-flex; align-items: center; min-height: var(--fd-target-min);
  font-size: var(--fd-type-small-size); line-height: var(--fd-type-small-line);
  color: var(--fd-text-secondary); text-decoration: none;
}
.foot-grid li a:hover { color: var(--fd-text-primary); text-decoration: underline; }
footer.site p { color: var(--fd-text-secondary); font-size: var(--fd-type-small-size); line-height: var(--fd-type-small-line); }
footer.site p.legal { max-width: none; margin-top: var(--fd-space-48); padding-top: var(--fd-space-24); border-top: 1px solid var(--fd-border-decorative); }

/* ---------- Responsive (breakpoints from TEN-CH-DESIGN-038) ---------- */
@media (max-width: 1023px) {
  section { padding: var(--fd-space-80) 0; }
  section.tight, .hero, .hero.compact { padding: var(--fd-space-64) 0; }
  .display-lg { font-size: var(--fd-type-display-sm-size); line-height: var(--fd-type-display-sm-line); letter-spacing: var(--fd-type-display-sm-tracking); }
  .display-md { font-size: var(--fd-type-display-sm-size); line-height: var(--fd-type-display-sm-line); }
  .grid-3 { grid-template-columns: 1fr; }
  .steps-layout { grid-template-columns: 1fr; gap: var(--fd-space-32); }
  .step-nav { position: static; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .menu-btn {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: var(--fd-target-min); min-height: var(--fd-target-min); padding: 0 var(--fd-space-16);
    background: transparent; border: 1px solid var(--fd-border-interactive); border-radius: var(--fd-radius-sm);
    color: var(--fd-text-primary); font: 600 var(--fd-type-small-size)/var(--fd-type-small-line) var(--fd-font-family); cursor: pointer;
  }
  nav.primary { position: relative; }
  nav.primary ul {
    display: none; position: absolute; right: 0; top: calc(100% + var(--fd-space-8));
    flex-direction: column; align-items: stretch; gap: 0; min-width: 240px;
    background: var(--fd-surface-page); border-radius: var(--fd-radius-md);
    box-shadow: var(--fd-elevation-overlay); padding: var(--fd-space-8);
  }
  nav.primary.open ul { display: flex; }
  nav.primary ul .btn { margin-top: var(--fd-space-8); }
}
@media (max-width: 767px) {
  .grid-2 { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .hero { background-image: linear-gradient(rgba(11,39,64,0.96), rgba(11,39,64,0.96)); }
  .navbar { min-height: var(--fd-header-height-mobile); gap: var(--fd-space-12); }
  html { scroll-padding-top: var(--fd-header-height-mobile); }
  .brand { gap: var(--fd-space-12); }
  .brandmark { height: var(--fd-space-32); }
  .brand-divider { margin: var(--fd-space-16) 0; }
  .sitename strong { font-size: var(--fd-type-body-lg-size); }
  .sitename span { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}

/* Spacing helpers (scale values only) */
.mt-16 { margin-top: var(--fd-space-16); }
.mt-24 { margin-top: var(--fd-space-24); }