:root {
  color-scheme: light;
  --bg: #f6f8f3;
  --ink: #1c261f;
  --muted: #5f6b62;
  --line: #d7dfd5;
  --panel: #ffffff;
  --accent: #1f6f4a;
  --accent-ink: #ffffff;
  --warn: #8a5a00;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
}

a {
  color: var(--accent);
}

.shell {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(246, 248, 243, 0.92);
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 760;
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.hero {
  padding: 88px 0 72px;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 56px;
  align-items: start;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.08;
  letter-spacing: 0;
}

h1 {
  max-width: 760px;
  font-size: clamp(2.5rem, 6vw, 5.8rem);
}

h2 {
  font-size: clamp(1.7rem, 3vw, 2.6rem);
}

h3 {
  font-size: 1.05rem;
}

p {
  margin: 0;
}

.lede {
  max-width: 680px;
  margin-top: 24px;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 690;
  text-decoration: none;
}

.button.secondary {
  background: transparent;
  color: var(--accent);
}

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

.status-panel dl {
  margin: 18px 0 0;
  display: grid;
  gap: 14px;
}

.status-panel dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 720;
  text-transform: uppercase;
}

.status-panel dd {
  margin: 3px 0 0;
  font-weight: 650;
}

.section {
  padding: 64px 0;
  border-bottom: 1px solid var(--line);
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.42fr) minmax(0, 0.58fr);
  gap: 52px;
}

.stack {
  display: grid;
  gap: 22px;
}

.list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.list li + li {
  margin-top: 10px;
}

.notice {
  padding: 18px 20px;
  border-left: 4px solid var(--warn);
  background: #fff7df;
  color: #4e390c;
}

.code-box {
  margin-top: 18px;
  padding: 18px;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: #111711;
  color: #e7f0e8;
  font: 0.94rem/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.callback-card {
  margin: 56px auto;
  width: min(860px, calc(100% - 40px));
  padding: 32px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.field {
  display: grid;
  gap: 8px;
  margin-top: 18px;
}

.field label {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 720;
  text-transform: uppercase;
}

.field input {
  width: 100%;
  min-height: 44px;
  padding: 9px 11px;
  border: 1px solid var(--line);
  color: var(--ink);
  font: 0.95rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.site-footer {
  padding: 32px 0;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 760px) {
  .shell {
    width: min(100% - 28px, 1080px);
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 18px 0;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 14px;
  }

  .hero {
    padding: 54px 0 48px;
  }

  .hero-grid,
  .section-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}