:root {
  color-scheme: light;
  --bg: #f7f4ed;
  --paper: #ffffff;
  --ink: #22312a;
  --muted: #627268;
  --line: #d9dfd2;
  --accent: #2f6f4e;
  --accent-soft: #e7f0e7;
  --warn: #7d4c15;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.shell {
  max-width: 980px;
  margin: 0 auto;
  padding: 32px 20px 56px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
}

.brand {
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.95rem;
}

.hero,
.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.hero {
  padding: 32px;
  margin-bottom: 24px;
}

.panel {
  padding: 24px;
  margin: 18px 0;
}

.eyebrow {
  color: var(--muted);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: 0;
}

h1 {
  margin: 8px 0 12px;
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
  margin: 0 0 12px;
  font-size: 1.55rem;
}

h3 {
  margin: 20px 0 8px;
  font-size: 1.05rem;
}

p,
ul,
ol {
  margin-top: 0;
}

li + li {
  margin-top: 6px;
}

.muted {
  color: var(--muted);
}

.notice {
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  padding: 14px 16px;
}

.warning {
  background: #fff7e8;
  border-left-color: var(--warn);
}

.grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.footer {
  margin-top: 32px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.placeholder {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: #edf1e8;
  color: #243328;
  border-radius: 4px;
  padding: 1px 5px;
}

@media (max-width: 640px) {
  .shell {
    padding: 20px 14px 44px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .panel {
    padding: 20px;
  }
}