/* trackEat landing — base reset + design system */

:root {
  --c-bg: #ffffff;
  --c-bg-soft: #f5f7fb;
  --c-bg-alt: #0f172a;
  --c-text: #0f172a;
  --c-text-soft: #475569;
  --c-primary: #2563eb;
  --c-primary-dark: #1d4ed8;
  --c-accent: #10b981;
  --c-border: #e2e8f0;
  --c-card: #ffffff;
  --shadow-sm: 0 1px 2px 0 rgba(15,23,42,0.04);
  --shadow-md: 0 6px 20px -6px rgba(15,23,42,0.10);
  --radius: 12px;
  --max-w: 1100px;
  --pad-x: 1.25rem;
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --c-bg: #0f172a;
    --c-bg-soft: #1e293b;
    --c-bg-alt: #020617;
    --c-text: #f1f5f9;
    --c-text-soft: #94a3b8;
    --c-card: #1e293b;
    --c-border: #334155;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--c-primary); text-decoration: none; transition: color 150ms ease; }
a:hover { color: var(--c-primary-dark); text-decoration: underline; }

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); margin-top: 0; }
h3 { font-size: 1.125rem; }
h4 { font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--c-text-soft); }

p { margin: 0 0 1rem; }

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

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

/* ── Header ───────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.95);
  border-bottom: 1px solid var(--c-border);
  backdrop-filter: saturate(180%) blur(8px);
}
@media (prefers-color-scheme: dark) {
  .site-header { background: rgba(15,23,42,0.85); }
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--c-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.logo:hover { text-decoration: none; color: var(--c-text); }
.logo-mark {
  display: inline-block;
  width: 8px;
  height: 24px;
  background: var(--c-primary);
  border-radius: 2px;
}
.logo-text strong { color: var(--c-primary); font-weight: 700; }

.nav-list {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}
.nav-list a {
  color: var(--c-text-soft);
  font-size: 0.95rem;
  font-weight: 500;
}
.nav-list a:hover { color: var(--c-primary); text-decoration: none; }
.nav-list .nav-cta {
  background: var(--c-text);
  color: var(--c-bg);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
}
.nav-list .nav-cta:hover { background: var(--c-primary); color: white; }

@media (max-width: 640px) {
  .nav-list { gap: 1rem; }
  .nav-list li:nth-child(2), .nav-list li:nth-child(3) { display: none; }
}

/* ── Hero ─────────────────────────────────────────── */
.hero {
  padding: 4rem 0 3.5rem;
  background: linear-gradient(180deg, var(--c-bg) 0%, var(--c-bg-soft) 100%);
}

.eyebrow {
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--c-primary);
  font-weight: 600;
  margin-bottom: 1rem;
}

.hl {
  background: linear-gradient(120deg, var(--c-primary) 0%, var(--c-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  font-size: 1.25rem;
  color: var(--c-text-soft);
  max-width: 60ch;
  margin-bottom: 2rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease;
  cursor: pointer;
  border: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }

.btn-primary {
  background: var(--c-primary);
  color: white;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover {
  background: var(--c-primary-dark);
  color: white;
}

.btn-ghost {
  background: transparent;
  color: var(--c-text);
  border: 1px solid var(--c-border);
}
.btn-ghost:hover { background: var(--c-bg-soft); color: var(--c-text); }

.btn-lg { padding: 1rem 2rem; font-size: 1.075rem; }

.hero-note {
  color: var(--c-text-soft);
  font-size: 0.9rem;
  margin-top: 1rem;
}

/* ── Sections ─────────────────────────────────────── */
section { padding: 4rem 0; }
.section-lede {
  color: var(--c-text-soft);
  font-size: 1.1rem;
  max-width: 60ch;
  margin-bottom: 3rem;
}

.features {
  background: var(--c-bg);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature {
  background: var(--c-card);
  padding: 1.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  transition: transform 200ms ease, box-shadow 200ms ease;
}
.feature:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.feature-icon {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 0.75rem;
}
.feature h3 { margin-bottom: 0.5rem; }
.feature p {
  color: var(--c-text-soft);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ── Why ──────────────────────────────────────────── */
.why { background: var(--c-bg-soft); }
.why-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 3rem;
  align-items: center;
}
@media (max-width: 768px) {
  .why-grid { grid-template-columns: 1fr; gap: 2rem; }
}

.why-list {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.why-list li {
  position: relative;
  padding-left: 1.75rem;
  color: var(--c-text-soft);
}
.why-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--c-accent);
  font-weight: 700;
}
.why-list strong { color: var(--c-text); }

.why-card {
  background: var(--c-card);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  box-shadow: var(--shadow-sm);
}
.why-quote {
  font-size: 1.075rem;
  font-style: italic;
  color: var(--c-text);
  margin-bottom: 1rem;
}
.why-author {
  font-size: 0.9rem;
  color: var(--c-text-soft);
  margin: 0;
}

/* ── FAQ ──────────────────────────────────────────── */
.faq { background: var(--c-bg); }
.faq h2 { margin-bottom: 2rem; }
.faq details {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  transition: box-shadow 150ms ease;
}
.faq details[open] { box-shadow: var(--shadow-sm); }
.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.25rem 0;
  list-style: none;
  position: relative;
  padding-right: 2rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--c-primary);
  transition: transform 200ms ease;
}
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p {
  color: var(--c-text-soft);
  margin-top: 0.75rem;
  margin-bottom: 0;
}

/* ── Final CTA ────────────────────────────────────── */
.final-cta {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-dark) 100%);
  color: white;
  text-align: center;
}
.final-cta h2 { color: white; margin-bottom: 1rem; }
.final-cta p {
  color: rgba(255,255,255,0.92);
  font-size: 1.125rem;
  margin-bottom: 2rem;
  max-width: 50ch;
  margin-left: auto;
  margin-right: auto;
}
.final-cta .btn-primary {
  background: white;
  color: var(--c-primary);
}
.final-cta .btn-primary:hover {
  background: var(--c-bg-soft);
  color: var(--c-primary-dark);
}

/* ── Footer ───────────────────────────────────────── */
.site-footer {
  background: var(--c-bg-alt);
  color: rgba(255,255,255,0.85);
  padding: 3rem 0 1.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: white;
  margin-bottom: 0.5rem;
}
.footer-tagline {
  color: rgba(255,255,255,0.65);
  font-size: 0.95rem;
}
.site-footer h4 {
  color: white;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}
.site-footer ul li {
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}
.site-footer a {
  color: rgba(255,255,255,0.75);
}
.site-footer a:hover { color: white; }

.footer-base {
  border-top: 1px solid rgba(255,255,255,0.10);
  padding-top: 1.5rem;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.55);
}

/* ── Legal pages typography ──────────────────────── */
.legal-page {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem var(--pad-x) 4rem;
  font-size: 1rem;
  line-height: 1.7;
}
.legal-page h1 { font-size: 2rem; margin-bottom: 0.5rem; }
.legal-page h2 { font-size: 1.4rem; margin-top: 2.5rem; }
.legal-page h3 { font-size: 1.1rem; margin-top: 1.5rem; }
.legal-page p, .legal-page li { color: var(--c-text); }
.legal-page ul, .legal-page ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
  list-style: disc;
}
.legal-page table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.95rem;
}
.legal-page th, .legal-page td {
  border: 1px solid var(--c-border);
  padding: 0.65rem;
  text-align: left;
}
.legal-page th { background: var(--c-bg-soft); }
.legal-page .updated {
  color: var(--c-text-soft);
  font-style: italic;
  margin-bottom: 2rem;
}