/* Vera Medical — component styles ("Clinical Precision").
 * Built entirely on tokens.css. Plain CSS (compile_sass = false). */

/* ---------- Reset / base ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-fg);
  background: var(--color-bg);
  font-size: var(--step-0);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  /* subtle brand wash at the very top — atmosphere, not a purple app */
  background-image: radial-gradient(circle at 50% -8%, rgba(63,111,224,var(--hero-glow)), transparent 55%);
  background-repeat: no-repeat;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--leading-tight);
  letter-spacing: -0.015em;
  margin: 0 0 var(--space-3);
  text-wrap: balance;
}
h1 { font-size: var(--step-5); }
h2 { font-size: var(--step-4); }
h3 { font-size: var(--step-2); }
p { margin: 0 0 var(--space-3); max-width: var(--maxw-text); }
img { max-width: 100%; height: auto; }

a { color: var(--color-link); text-decoration: underline; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

/* ---------- Focus (visible, brand-tinted) ---------- */
:focus-visible {
  outline: 2px solid transparent;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

/* ---------- Skip link ---------- */
.skip-link { position: absolute; left: -999px; }
.skip-link:focus {
  left: var(--space-2); top: var(--space-2);
  background: var(--color-fg); color: var(--color-bg);
  padding: var(--space-1) var(--space-2); z-index: 100; border-radius: var(--radius-sm);
}

/* ---------- Layout primitives ---------- */
.container { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--space-3); }
main { max-width: var(--maxw); margin: 0 auto; padding: var(--space-4) var(--space-3); }

/* ---------- Site header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-3);
  max-width: var(--maxw); margin-inline: auto;
  padding: 0 var(--space-3); height: 64px;
  border-bottom: 1px solid var(--color-line);
  background: color-mix(in srgb, var(--color-bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
}
.brand {
  display: inline-flex; align-items: center;
  color: var(--color-fg); text-decoration: none;
  min-width: 0; max-width: 100%;
}
/* Evolved triknot logo. The header lockup is the icon mark (decorative)
   plus the brand name as real, config-driven text — see macros/branding.html.
   The text uses var(--color-fg) so it adapts to light/dark automatically,
   and wraps/shrinks instead of clipping when the configured name is long. */
.logo { display: block; width: auto; }
.logo--icon, .logo--mono { height: 28px; }
.brand-lockup {
  display: inline-flex; align-items: center; gap: .55rem;
  min-width: 0; max-width: 100%;
}
.brand-lockup .logo--icon { flex: none; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-0);
  letter-spacing: -0.01em;
  color: var(--color-fg);
  line-height: var(--leading-tight);
  overflow-wrap: break-word;
  min-width: 0;
}
.site-nav ul { display: flex; align-items: center; gap: var(--space-3); list-style: none; margin: 0; padding: 0; }
.site-nav a {
  color: var(--color-muted); text-decoration: none;
  font-size: var(--step--1); font-weight: 500; letter-spacing: .01em;
}
.site-nav a:hover { color: var(--color-fg); }
.site-nav .nav-cta {
  color: var(--color-fg); font-weight: 600;
  padding: .45rem .9rem; border: 1px solid var(--color-line-strong); border-radius: var(--radius);
}
.site-nav .nav-cta:hover { border-color: var(--color-muted); }

/* ---------- Mobile nav toggle (progressive enhancement) ----------
   The button is `hidden` in markup and only revealed by site.js, so it never
   appears without JS. Even once revealed it is `display: none` at desktop
   widths — it is only shown inside the <=720px media query below, so the full
   nav (not a hamburger) is what shows on wide screens. The nav itself stays
   visible/stacked at narrow widths without JS; JS adds `.js-nav` to collapse it
   behind this toggle. */
.nav-toggle {
  display: none; align-items: center; justify-content: center;
  width: 44px; height: 44px; flex: none;
  padding: 0; margin: 0;
  background: transparent; border: 1px solid var(--color-line-strong);
  border-radius: var(--radius); color: var(--color-fg);
  cursor: pointer;
}
.nav-toggle[hidden] { display: none; }
.nav-toggle:hover { border-color: var(--color-muted); }
/* Hamburger bars drawn with a middle bar + ::before/::after. */
.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block; width: 20px; height: 2px; border-radius: 2px;
  background: currentColor;
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}
.nav-toggle-bars { position: relative; }
.nav-toggle-bars::before,
.nav-toggle-bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }
/* Open state: morph into an X. */
.nav-open .nav-toggle-bars { background: transparent; }
.nav-open .nav-toggle-bars::before { top: 0; transform: rotate(45deg); }
.nav-open .nav-toggle-bars::after { top: 0; transform: rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font: inherit; font-weight: 600; font-size: var(--step--1); letter-spacing: .01em;
  padding: .7rem 1.25rem; border-radius: var(--radius);
  border: 1px solid var(--color-line-strong); background: var(--color-bg); color: var(--color-fg);
  text-decoration: none; cursor: pointer;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); border-color: var(--color-muted); }
.btn--ghost { background: transparent; border-color: transparent; padding-inline: .5rem; }
.btn--ghost:hover { border-color: transparent; box-shadow: none; }
.btn--primary {
  color: var(--color-on-accent); border: none;
  background: var(--brand-gradient); box-shadow: var(--shadow-accent);
}
.btn--primary:hover { box-shadow: 0 10px 26px -8px rgba(138,90,208,.6); }

/* ---------- Eyebrow / lede ---------- */
.eyebrow {
  display: block; margin-bottom: var(--space-2);
  font-size: var(--step--1); font-weight: 600;
  text-transform: uppercase; letter-spacing: var(--tracking-eyebrow); color: var(--color-muted);
}
.lede {
  font-family: var(--font-body); font-size: var(--step-2); line-height: 1.42;
  color: var(--color-muted); max-width: 46ch; margin-bottom: var(--space-4);
}

/* ---------- Hero ---------- */
.hero { padding: var(--space-7) 0 var(--space-6); position: relative; }
.hero::before { /* the single hairline gradient accent rule */
  content: ""; display: block; width: 64px; height: 3px; border-radius: 3px;
  background: var(--brand-gradient); margin-bottom: var(--space-3);
}
.hero h1 { max-width: 16ch; }
.hero .grad, .grad-text {
  background: var(--brand-gradient);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero > p { font-size: var(--step-2); color: var(--color-muted); max-width: 46ch; line-height: 1.42; }
.cta-row { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-4); }

/* ---------- Sections ---------- */
.section { padding: var(--space-7) 0; border-top: 1px solid var(--color-line); }
.section:first-child { border-top: none; }
.section--surface { background: var(--color-surface); }
.section--plain { border-top: none; }
.section > .container > .eyebrow { margin-bottom: var(--space-2); }

/* ---------- Grid + cards ---------- */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--color-bg); border: 1px solid var(--color-line); border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-3);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--color-line-strong); }
.card h3 { margin-bottom: var(--space-1); }
.card p { color: var(--color-muted); margin-bottom: 0; }

/* ---------- Homepage sections (Task 4) ---------- */
/* Section rhythm: a lede under each h2, generous vertical air. The default
   .grid is already 3-col; .grid--3 is an explicit alias for readable markup. */
.grid--3 { grid-template-columns: repeat(3, 1fr); }
#hero .eyebrow { margin-bottom: var(--space-2); }
#hero > .cta-row .btn--ghost { font-size: var(--step-0); }

/* problem — the bottleneck */
.problem-grid { margin-top: var(--space-4); }
.problem-note {
  margin-top: var(--space-4); max-width: var(--maxw-text);
  font-family: var(--font-display); font-size: var(--step-1);
  line-height: 1.4; color: var(--color-fg);
}

/* tools — the software story (65%): the most prominent section */
.tools-grid { margin-top: var(--space-4); }
.tools-grid .card { padding: var(--space-4) var(--space-4); }
.tools-cta { margin-top: var(--space-4); }

/* robotics — the roadmap (35%): visibly secondary, forward-looking */
.roadmap-grid { align-items: center; gap: var(--space-5); }
.roadmap .eyebrow { color: var(--grad-b); }
.roadmap-note {
  margin-top: var(--space-3); margin-bottom: 0;
  font-size: var(--step--1); font-weight: 600; letter-spacing: .04em;
  text-transform: uppercase; color: var(--color-muted);
}
.roadmap-visual { display: flex; }
.roadmap-panel {
  position: relative; width: 100%; min-height: 220px; border-radius: var(--radius-lg);
  border: 1px solid var(--color-line);
  background:
    radial-gradient(120% 120% at 80% 10%, color-mix(in srgb, var(--grad-c) 16%, transparent), transparent 60%),
    radial-gradient(120% 120% at 10% 90%, color-mix(in srgb, var(--grad-a) 12%, transparent), transparent 55%),
    linear-gradient(135deg, color-mix(in srgb, var(--grad-b) 10%, transparent), transparent 70%);
  display: flex; align-items: flex-end; padding: var(--space-3);
  overflow: hidden;
}
.roadmap-panel::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--color-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-line) 1px, transparent 1px);
  background-size: 28px 28px; opacity: .35; -webkit-mask-image: radial-gradient(120% 120% at 70% 20%, #000, transparent 75%); mask-image: radial-gradient(120% 120% at 70% 20%, #000, transparent 75%);
}
.roadmap-badge {
  position: relative; z-index: 1;
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .4rem .8rem; border-radius: var(--radius-pill);
  background: var(--color-bg); border: 1px solid var(--color-line-strong);
  font-size: var(--step--1); font-weight: 600; color: var(--color-fg);
}
.roadmap-badge::before {
  content: ""; width: .55rem; height: .55rem; border-radius: 50%;
  background: var(--brand-gradient);
}

/* clinics — teaser */
.clinics-inner .lede { max-width: 54ch; }

/* team — 4-person teaser */
.team-grid {
  list-style: none; margin: var(--space-4) 0 var(--space-4); padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3);
}
.team-member {
  display: flex; flex-direction: column; gap: .2rem;
  padding-top: var(--space-2); border-top: 2px solid var(--color-line-strong);
}
.team-name { font-family: var(--font-display); font-size: var(--step-1); font-weight: 600; color: var(--color-fg); }
.team-role { font-size: var(--step--1); color: var(--color-muted); }

/* cta — dual final CTA */
.cta-final h2 { max-width: 20ch; }
.cta-grid { margin-top: var(--space-4); }
.cta-card { display: flex; flex-direction: column; align-items: flex-start; }
.cta-card p { flex: 1; }
.cta-card .btn { margin-top: var(--space-3); }

/* ---------- Content (markdown page bodies) ---------- */
.page { max-width: var(--maxw-text); }
.page h1 { margin-top: 0; }
.page :is(h2, h3) { margin-top: var(--space-5); }
.post-list { list-style: none; margin: 0; padding: 0; }
.post-list li { padding: var(--space-3) 0; border-top: 1px solid var(--color-line); }
.post-list li:first-child { border-top: none; }
.post-list a { font-family: var(--font-display); font-size: var(--step-2); text-decoration: none; }
.post-list a:hover { text-decoration: underline; }
.post-list time { display: block; color: var(--color-muted); font-size: var(--step--1); margin-top: .25rem; }

/* ---------- Inner pages (Task 5) ---------- */
/* Prose-section: a full-bleed band inside a page body, so inner pages can
   alternate surfaces like the homepage while still living in .page prose. */
.prose-section {
  margin: var(--space-5) 0;
  padding: 0;
}
.prose-section:first-child { margin-top: var(--space-4); }
.prose-section--surface {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-inline: calc(-1 * var(--space-4));
}
.prose-section > .eyebrow { margin-bottom: var(--space-2); }
.prose-section > h2:first-child,
.prose-section > .eyebrow + h2 { margin-top: 0; }
.prose-section .cta-row { margin-top: var(--space-4); }

/* Feature grid on inner pages: cards drop below full text width. */
.feature-grid { margin: var(--space-4) 0; }
.feature-grid.grid, .feature-grid.grid--2, .feature-grid.grid--3 { max-width: none; }

/* Contact — role-segmented mailto paths */
.contact-paths { list-style: none; margin: var(--space-4) 0; padding: 0; }
.contact-path {
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-line);
}
.contact-path:first-child { border-top: none; padding-top: 0; }
.contact-path h2 { margin-top: 0; margin-bottom: var(--space-2); font-size: var(--step-2); }
.contact-path p { color: var(--color-muted); }
.contact-hint {
  font-size: var(--step--1);
  color: var(--color-muted);
  border-left: 2px solid var(--color-line-strong);
  padding-left: var(--space-2);
}
.contact-email {
  margin-top: var(--space-2); margin-bottom: 0;
  font-family: var(--font-display); font-size: var(--step-1);
}
.contact-email a { text-decoration: none; }
.contact-email a:hover { text-decoration: underline; }

/* Team roster — 4-person grid with photos + monogram placeholder */
.team-roster {
  list-style: none; margin: var(--space-4) 0 0; padding: 0; max-width: none;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3);
}
.team-card {
  display: flex; gap: var(--space-3); align-items: flex-start;
  background: var(--color-bg);
  border: 1px solid var(--color-line); border-radius: var(--radius-lg);
  padding: var(--space-3);
}
.team-avatar {
  flex: none; width: 88px; height: 88px; border-radius: var(--radius-lg);
  object-fit: cover; background: var(--color-surface);
  border: 1px solid var(--color-line);
}
.team-avatar--placeholder {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--brand-gradient);
  color: var(--color-on-accent);
  border-color: transparent;
}
.team-monogram {
  font-family: var(--font-display); font-weight: 600;
  font-size: var(--step-3); line-height: 1;
  color: var(--color-on-accent);
}
.team-body { display: flex; flex-direction: column; gap: .15rem; min-width: 0; }
.team-body .team-name {
  font-family: var(--font-display); font-size: var(--step-1); font-weight: 600; color: var(--color-fg);
}
.team-body .team-role { font-size: var(--step--1); color: var(--color-muted); }
.team-bio {
  margin: var(--space-2) 0 0; color: var(--color-muted);
  font-size: var(--step-0); line-height: var(--leading-body);
}
.team-card[data-placeholder] .team-bio { font-style: italic; }

/* ---------- Blog section (Task 6) ---------- */
.post {
  max-width: var(--maxw-text);
  margin: 0 auto;
}

.post-meta {
  margin-bottom: var(--space-5);
}

.post-meta h1 {
  margin-bottom: var(--space-2);
}

.post-meta time {
  display: block;
  color: var(--color-muted);
  font-size: var(--step--1);
}

.post-prose {
  line-height: var(--leading-body);
  margin-bottom: var(--space-5);
}

.post-prose > :first-child {
  margin-top: 0;
}

.post-prose h2 {
  margin-top: var(--space-5);
  margin-bottom: var(--space-3);
}

.post-prose h3 {
  margin-top: var(--space-4);
  margin-bottom: var(--space-2);
}

.post-prose p {
  max-width: none;
  margin-bottom: var(--space-3);
}

.post-prose ul, .post-prose ol {
  margin: 0 0 var(--space-3) var(--space-3);
  padding-left: var(--space-2);
}

.post-prose li {
  margin-bottom: var(--space-2);
  line-height: var(--leading-body);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-line);
}

.tag-link {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: var(--step--1);
  color: var(--color-link);
  transition: background-color 0.15s ease-out;
}

.tag-link:hover {
  background: var(--color-line);
  text-decoration: none;
}

.post-nav {
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-line);
}

.post-nav a {
  display: inline-block;
  text-decoration: none;
  font-weight: 500;
  color: var(--color-link);
}

.post-nav a:hover {
  text-decoration: underline;
}

.back-link {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
}

.back-link a {
  text-decoration: none;
  font-weight: 500;
  color: var(--color-link);
}

.back-link a:hover {
  text-decoration: underline;
}

.tag-list {
  list-style: none;
  margin: var(--space-4) 0;
  padding: 0;
}

.tag-list li {
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-line);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tag-list li:first-child {
  border-top: none;
}

.tag-list a {
  font-family: var(--font-display);
  font-size: var(--step-1);
  text-decoration: none;
}

.tag-list a:hover {
  text-decoration: underline;
}

.tag-count {
  font-size: var(--step--1);
  color: var(--color-muted);
  font-weight: 500;
}

/* ---------- Footer ---------- */
.site-footer {
  max-width: var(--maxw); margin: 0 auto; padding: var(--space-5) var(--space-3);
  border-top: 1px solid var(--color-line); color: var(--color-muted); font-size: var(--step--1);
  display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-4); justify-content: space-between;
}
.site-footer p { margin: 0; max-width: none; }
.site-footer a { color: var(--color-muted); }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .grid, .grid--2, .grid--3 { grid-template-columns: 1fr; }
  .site-nav ul { gap: var(--space-2); }
  .hero { padding-top: var(--space-6); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .team-roster { grid-template-columns: 1fr; }
  .prose-section--surface { margin-inline: calc(-1 * var(--space-3)); padding: var(--space-3); }
  .roadmap-visual { order: -1; }
  .roadmap-panel { min-height: 150px; }
}
@media (max-width: 480px) {
  .team-grid { grid-template-columns: 1fr; }
  .team-card { flex-direction: column; }
}

/* ---------- Mobile header / nav (<= 720px) ----------
   No-JS baseline: the header row wraps and the nav drops below it, stacked and
   fully visible — navigation works with JS off. When site.js adds `.js-nav`,
   the nav collapses behind the hamburger and reveals on `.nav-open`. */
@media (max-width: 720px) {
  .site-header {
    height: auto; min-height: 64px;
    flex-wrap: wrap; row-gap: var(--space-2);
    padding-block: var(--space-2);
  }
  .brand { flex: 1 1 auto; }
  /* Nav takes the full width on its own row below the brand/toggle row. */
  .site-nav { flex-basis: 100%; }
  .site-nav ul {
    flex-direction: column; align-items: stretch;
    gap: var(--space-1);
    padding-top: var(--space-2);
    border-top: 1px solid var(--color-line);
  }
  .site-nav a { display: block; padding: var(--space-1) 0; font-size: var(--step-0); }
  .site-nav .nav-cta { display: inline-block; width: max-content; margin-top: var(--space-1); }

  /* Reveal the hamburger at narrow widths (JS un-hides it; if JS is off it
     stays `[hidden]` and this never applies, so the stacked nav is the UI). */
  .nav-toggle:not([hidden]) { display: inline-flex; }

  /* JS-enhanced: collapse the nav behind the toggle. */
  .js-nav .site-nav { display: none; }
  .js-nav.nav-open .site-nav { display: block; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  body { background-image: none; } /* disable the gradient wash */
  .btn:hover, .card:hover { transform: none; }
}