:root {
  color-scheme: light;
  --ink: #24211d;
  --muted-ink: #5d5851;
  --line: #dad4c8;
  --paper: #fdfcf8;
  --panel: #ffffff;
  --wash: #f2efe6;
  --green: #3b6f6a;
  --green-dark: #244d4a;
  --red: #b4543f;
  --blue: #2f5e88;
  --shadow: 0 18px 50px rgba(36, 33, 29, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

code,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(218, 212, 200, 0.82);
  background: rgba(253, 252, 248, 0.92);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 18px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: var(--green);
  color: #ffffff;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--muted-ink);
  font-size: 14px;
  font-weight: 700;
}

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

.site-nav a:hover {
  color: var(--green-dark);
}

.hero,
.section,
.split-section {
  padding: clamp(56px, 8vw, 96px) clamp(20px, 5vw, 72px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(320px, 0.82fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  max-width: 820px;
}

.eyebrow,
.panel-label {
  margin: 0 0 12px;
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 900px;
  margin-bottom: 22px;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.lead {
  max-width: 720px;
  color: var(--muted-ink);
  font-size: clamp(18px, 2.3vw, 23px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 10px 16px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  font-weight: 800;
  text-decoration: none;
}

.button.primary {
  background: var(--ink);
  color: #ffffff;
}

.button.secondary {
  background: var(--panel);
}

.quick-start {
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 22px;
}

.quick-start pre {
  overflow-x: auto;
  margin: 0;
  padding: 20px;
  border-radius: 8px;
  background: #1f2426;
  color: #f7f3e8;
  font-size: 14px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 32px;
}

.request-flow {
  display: grid;
  gap: 18px;
  max-width: 1180px;
}

.flow-rail {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 26px;
  padding: 42px;
  margin: 0;
  overflow: hidden;
  border: 2px solid var(--ink);
  border-radius: 14px;
  background:
    linear-gradient(90deg, rgba(59, 111, 106, 0.12) 0 1px, transparent 1px 100%),
    var(--wash);
  background-size: 28px 100%;
  list-style: none;
}

.flow-rail::before {
  content: "";
  position: absolute;
  right: 70px;
  left: 70px;
  top: 50%;
  height: 4px;
  background: var(--green);
  transform: translateY(-50%);
}

.flow-node {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 220px;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
  padding: 22px;
  border: 2px solid var(--ink);
  border-radius: 10px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.flow-count {
  width: fit-content;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--green);
  color: #ffffff;
  font-size: 12px;
  font-weight: 900;
}

.flow-node h3 {
  margin-bottom: 8px;
  font-size: clamp(24px, 2.5vw, 32px);
  line-height: 1.05;
}

.flow-node p {
  margin-bottom: 0;
  color: var(--muted-ink);
  font-size: 16px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.flow-node code {
  white-space: normal;
}

.flow-lessons {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  padding: 18px;
  border: 2px solid var(--ink);
  border-radius: 14px;
  background: var(--panel);
}

.flow-lessons article {
  min-height: 150px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.flow-lessons span {
  display: block;
  margin-bottom: 28px;
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.flow-lessons p {
  margin-bottom: 0;
  color: var(--muted-ink);
  font-size: 16px;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(320px, 1.15fr);
  gap: clamp(32px, 5vw, 72px);
  border-top: 1px solid var(--line);
}

.split-section > div:first-child p {
  max-width: 620px;
  color: var(--muted-ink);
  font-size: 18px;
}

.checklist {
  display: grid;
  gap: 14px;
}

.checklist div {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 12px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.checklist p,
.timeline p,
.package-grid p,
.learning-note p,
.site-footer p {
  margin-bottom: 0;
  color: var(--muted-ink);
}

.status-dot {
  width: 12px;
  height: 12px;
  margin-top: 7px;
  border-radius: 999px;
  background: var(--green);
}

.muted {
  border-top: 1px solid var(--line);
  background: var(--wash);
}

.package-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.package-grid article {
  min-height: 190px;
  padding: 22px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: var(--panel);
}

.timeline {
  display: grid;
  gap: 18px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.timeline li {
  padding: 0 0 20px 24px;
  border-left: 3px solid var(--green);
}

.timeline span {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--red);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.timeline strong {
  display: block;
  margin-bottom: 6px;
  font-size: 20px;
}

.learning-note {
  max-width: 780px;
}

.text-link {
  display: inline-flex;
  margin-top: 18px;
  color: var(--blue);
  font-weight: 900;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
}

.site-footer a {
  color: var(--blue);
  font-weight: 800;
}

@media (max-width: 900px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .split-section,
  .package-grid {
    grid-template-columns: 1fr;
  }

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

  .flow-rail {
    padding: 24px;
  }

  .flow-rail::before {
    top: 30px;
    bottom: 30px;
    left: 38px;
    width: 4px;
    height: auto;
    transform: none;
  }

  .flow-node {
    min-height: 0;
    gap: 18px;
    padding-left: 48px;
  }

  .flow-lessons article {
    min-height: 0;
  }

  .flow-lessons span {
    margin-bottom: 10px;
  }

  .hero {
    min-height: auto;
  }
}

@media (max-width: 560px) {
  .site-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    justify-content: center;
  }

  .flow-rail,
  .flow-lessons {
    padding: 16px;
  }

  .flow-node {
    padding: 18px 18px 18px 38px;
  }
}