:root {
  --bg: #0b1120;
  --surface: #151e2e;
  --elevated: #1e293b;
  --border: #334155;
  --text: #f8fafc;
  --muted: #94a3b8;
  --navy: #1e3a8a;
  --accent: #22d3ee;
  --tracky: #059669;
  --font: Inter, "SF Pro Display", system-ui, sans-serif;
  --max: 1040px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.wrap {
  width: min(var(--max), calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  padding: 20px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: 17px;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--elevated);
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
}

.brand-mark span:first-child {
  background: var(--tracky);
}

.brand-mark span:last-child {
  background: var(--navy);
}

main {
  flex: 1;
  padding: 72px 0 96px;
}

.hero {
  max-width: 640px;
  margin-bottom: 48px;
}

.kicker {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(36px, 6vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.04em;
  font-weight: 800;
}

.lede {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.products {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.product {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 28px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 100%;
}

.product:hover {
  border-color: rgba(148, 163, 184, 0.5);
}

.product-top {
  display: flex;
  align-items: center;
  gap: 12px;
}

.product-top img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #fff;
  object-fit: contain;
}

.product-top img.tracky-logo {
  background: var(--tracky);
  object-fit: cover;
}

.product-top img.keepbook-logo {
  padding: 8px;
  background: #1e3a8a;
}

.product h2 {
  margin: 0;
  font-size: 22px;
  letter-spacing: -0.03em;
}

.tagline {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.learn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
  width: fit-content;
}

.learn-tracky {
  background: var(--tracky);
  color: #fff;
}

.learn-keepbook {
  background: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
  color: #fff;
}

.store-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}

.store-row img {
  height: 40px;
  width: auto;
}

.site-footer {
  padding: 24px 0 40px;
  color: var(--muted);
  font-size: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.site-footer nav {
  display: flex;
  gap: 16px;
}

.site-footer a:hover {
  color: var(--text);
}

.error-card {
  max-width: 420px;
  margin: 80px auto;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 40px 28px;
}

.error-card .code {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: 8px;
}

.error-card p {
  color: var(--muted);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 24px;
}

@media (min-width: 800px) {
  .products {
    grid-template-columns: 1fr 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}