/* Tracevara — base design system */

:root {
  --bg: #0a1017;
  --bg-raised: #0f1922;
  --bg-card: #101b25;
  --line: rgba(148, 178, 199, 0.16);
  --line-strong: rgba(148, 178, 199, 0.28);
  --text: #e7eef4;
  --text-muted: #a9bac8;
  --text-faint: #7c8fa0;
  --accent: #3fd0c9;
  --accent-2: #7c9cff;
  --focus: #ffd166;
  --radius: 10px;
  --maxw: 1120px;
  font-size: 16px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", ui-sans-serif, system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a { color: inherit; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #04211f;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  font-weight: 600;
  z-index: 100;
}
.skip-link:focus {
  left: 0;
}

/* Focus visibility */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 16, 23, 0.86);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  text-decoration: none;
}
.brand img { width: 28px; height: 28px; }

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 0.95rem;
}

.main-nav ul {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}
.main-nav a:hover { color: var(--text); }

@media (max-width: 780px) {
  .nav-toggle { display: inline-flex; }
  .main-nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg-raised);
    border-bottom: 1px solid var(--line);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .main-nav.open { max-height: 320px; }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 8px 24px 20px;
  }
  .main-nav li { border-top: 1px solid var(--line); }
  .main-nav a { display: block; padding: 14px 0; }
}

/* Sections */
section { padding: 88px 0; border-bottom: 1px solid var(--line); }
section:last-of-type { border-bottom: none; }

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 14px;
}

h1, h2, h3 { font-weight: 700; letter-spacing: -0.01em; line-height: 1.2; }
h1 { font-size: clamp(2rem, 4.5vw, 3.1rem); margin: 0 0 20px; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin: 0 0 16px; }
h3 { font-size: 1.15rem; margin: 0 0 8px; }

p { color: var(--text-muted); margin: 0 0 16px; }
p:last-child { margin-bottom: 0; }

/* Hero */
.hero {
  padding-top: 72px;
  background:
    radial-gradient(600px 300px at 85% -10%, rgba(124,156,255,0.10), transparent 60%),
    linear-gradient(180deg, #0a1017 0%, #0a1017 100%);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.badge::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(63,208,201,0.18);
}

.hero-subhead {
  font-size: 1.15rem;
  max-width: 52ch;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #04211f;
}
.btn-primary:hover { background: #58ddd7; }

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--line-strong);
}
.btn-secondary:hover { border-color: var(--accent-2); }

/* Hero visual: trace motif, pure CSS/SVG */
.hero-visual {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 28px;
}
.hero-visual svg { width: 100%; height: auto; }

/* Problem grid */
.problem-list {
  list-style: none;
  padding: 0;
  margin: 32px 0 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
@media (max-width: 700px) {
  .problem-list { grid-template-columns: 1fr; }
}
.problem-list li {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--bg-raised);
  color: var(--text-muted);
}
.problem-list li strong { color: var(--text); display: block; margin-bottom: 6px; }

/* How it works — flow */
.flow {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  margin-top: 44px;
  position: relative;
}
@media (max-width: 900px) {
  .flow { grid-template-columns: 1fr; gap: 18px; }
}

.flow-step {
  position: relative;
  padding: 0 14px;
  text-align: left;
}
.flow-step .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 14px;
}
.flow-step h3 { font-size: 0.98rem; }
.flow-step p { font-size: 0.9rem; }

.flow-step::after {
  content: "";
  position: absolute;
  top: 15px;
  left: 100%;
  width: 24px;
  height: 1px;
  background: var(--line-strong);
}
.flow-step:last-child::after { display: none; }

@media (max-width: 900px) {
  .flow-step::after {
    top: auto;
    bottom: -18px;
    left: 15px;
    width: 1px;
    height: 18px;
  }
}

/* Platform cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin-top: 36px;
}
@media (max-width: 780px) {
  .card-grid { grid-template-columns: 1fr; }
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 26px;
}
.card .index {
  color: var(--accent-2);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

/* Evidence list */
.evidence-callout {
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  background: var(--bg-raised);
  padding: 20px 24px;
  margin: 28px 0 8px;
  font-weight: 600;
  color: var(--text);
}

.evidence-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.evidence-list li {
  padding-left: 26px;
  position: relative;
  color: var(--text-muted);
}
.evidence-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--accent);
  border-radius: 2px;
  transform: rotate(45deg);
}

/* Roadmap subsection */
.roadmap-note {
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-top: 32px;
  background: rgba(124,156,255,0.05);
}
.roadmap-note .eyebrow { color: var(--accent-2); }

/* Design partner offer list */
.offer-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 32px;
}
@media (max-width: 780px) {
  .offer-columns { grid-template-columns: 1fr; }
}
.offer-columns ul { margin: 0; padding-left: 20px; color: var(--text-muted); }
.offer-columns li { margin-bottom: 10px; }

/* Founder */
.founder-block {
  max-width: 68ch;
}

/* Contact / footer CTA */
.cta-section {
  text-align: center;
}
.cta-section .btn-primary { margin-top: 8px; }

footer.site-footer {
  padding: 40px 0;
  color: var(--text-faint);
  font-size: 0.85rem;
}
.footer-row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}
.footer-row a { color: var(--text-faint); text-decoration: underline; }
.footer-row a:hover { color: var(--text-muted); }

.section-intro { max-width: 68ch; }