:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5d687a;
  --line: #d9e0e8;
  --paper: #f7f9fb;
  --white: #ffffff;
  --teal: #34b99f;
  --blue: #416fd8;
  --amber: #d98d2d;
  --rose: #d7596f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 3;
  border-bottom: 1px solid rgba(23, 32, 51, 0.08);
  background: rgba(247, 249, 251, 0.92);
  backdrop-filter: blur(18px);
}

.nav {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 760;
  text-decoration: none;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a {
  text-decoration: none;
}

.hero {
  min-height: calc(100vh - 64px);
  display: grid;
  align-items: center;
  background:
    linear-gradient(120deg, rgba(52, 185, 159, 0.16), rgba(65, 111, 216, 0.14) 46%, rgba(217, 141, 45, 0.14)),
    url("assets/app-icon.png") right 8vw center / min(42vw, 480px) no-repeat;
}

.hero-inner {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 58px 0 96px;
}

.hero-copy {
  max-width: 650px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--blue);
  font-weight: 760;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: clamp(44px, 8vw, 92px);
  line-height: 0.95;
  letter-spacing: 0;
}

.lead {
  max-width: 600px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 20px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--white);
  font-weight: 720;
  text-decoration: none;
}

.button.secondary {
  background: var(--white);
  color: var(--ink);
  border: 1px solid var(--line);
}

.band {
  padding: 72px 0;
}

.inner {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.section-title {
  max-width: 720px;
  margin: 0 0 28px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.04;
  letter-spacing: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.tile {
  min-height: 178px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.mark {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  margin-bottom: 18px;
}

.mark.teal { background: var(--teal); }
.mark.blue { background: var(--blue); }
.mark.amber { background: var(--amber); }
.mark.rose { background: var(--rose); }

.tile h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.tile p,
.doc p,
.doc li {
  color: var(--muted);
}

.flow {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: start;
}

.panel {
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--white);
}

.prompt {
  display: grid;
  gap: 12px;
  margin: 0;
}

.prompt div {
  padding: 14px 16px;
  border-radius: 8px;
  background: #eef3f8;
  font-weight: 720;
}

.timer {
  font-size: 72px;
  line-height: 1;
  font-weight: 820;
  color: var(--blue);
}

.doc {
  max-width: 820px;
  padding: 44px 0 84px;
}

.doc h1 {
  font-size: clamp(36px, 7vw, 66px);
  margin-bottom: 24px;
}

.doc h2 {
  margin-top: 34px;
  font-size: 24px;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0;
  color: var(--muted);
}

.footer-row {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
}

.footer-row a {
  color: var(--muted);
  margin-left: 16px;
}

@media (max-width: 780px) {
  .nav {
    align-items: flex-start;
    padding: 14px 0;
    flex-direction: column;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 12px;
  }

  .hero {
    min-height: auto;
    background:
      linear-gradient(130deg, rgba(52, 185, 159, 0.2), rgba(65, 111, 216, 0.14), rgba(217, 141, 45, 0.14)),
      url("assets/app-icon.png") right -80px top 38px / 260px no-repeat;
  }

  .hero-inner {
    padding-top: 220px;
  }

  .grid,
  .flow {
    grid-template-columns: 1fr;
  }

  .tile {
    min-height: 140px;
  }
}