:root {
  --ink: #1a1815;
  --ink-soft: #4a4540;
  --paper: #f4f0e8;
  --paper-warm: #ebe4d4;
  --rule: #2a2622;
  --accent: #c2410c;
  --accent-two: #166534;
  --display: "Fraunces", Georgia, serif;
  --body: "Inter Tight", system-ui, sans-serif;
  --mono: "JetBrains Mono", monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.45;
  background-image:
    radial-gradient(circle at 12% 0%, rgba(194, 65, 12, 0.08), transparent 38%),
    radial-gradient(circle at 82% 100%, rgba(22, 101, 52, 0.08), transparent 44%);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2rem);
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  border-bottom: 2px solid var(--rule);
  padding-bottom: 0.9rem;
  margin-bottom: 1.4rem;
}

.brand {
  font-family: var(--mono);
  text-transform: uppercase;
  font-size: 0.73rem;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
}

.nav-links {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.nav-links a,
.button {
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  border: 1px solid var(--rule);
  background: var(--paper-warm);
  padding: 0.5rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
}

.nav-links a:hover,
.button:hover {
  background: var(--paper);
}

.hero {
  border: 1px solid var(--rule);
  background: var(--paper-warm);
  padding: clamp(1.1rem, 3vw, 2rem);
  margin-bottom: 1.3rem;
}

.hero h1 {
  font-family: var(--display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin: 0;
}

.hero p {
  margin-top: 0.9rem;
  color: var(--ink-soft);
  max-width: 70ch;
}

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  border: 1px solid var(--rule);
  background: var(--paper-warm);
  padding: 1rem;
}

.card h2,
.card h3 {
  margin-top: 0;
  margin-bottom: 0.65rem;
  font-family: var(--display);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.card p,
.muted {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 0.8rem;
}

label {
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink);
  padding: 0.62rem 0.72rem;
  font: inherit;
}

textarea {
  min-height: 180px;
  resize: vertical;
}

.notice {
  border-left: 3px solid var(--accent);
  background: #fdf3ea;
  padding: 0.7rem 0.85rem;
  margin-bottom: 1rem;
  font-size: 0.92rem;
}

.notice.ok {
  border-left-color: var(--accent-two);
  background: #edf8ef;
}

.list {
  display: grid;
  gap: 0.75rem;
}

.item {
  border: 1px solid var(--rule);
  background: var(--paper-warm);
  padding: 0.8rem;
}

.item-title {
  font-weight: 600;
}

.item-meta {
  font-family: var(--mono);
  color: var(--ink-soft);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  margin-top: 0.2rem;
}

pre {
  white-space: pre-wrap;
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 0.7rem;
  margin-top: 0.6rem;
  max-height: 260px;
  overflow: auto;
}

.footer-note {
  margin-top: 1.6rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  border-top: 1px solid var(--rule);
  padding-top: 0.8rem;
}

.setup-section {
  margin-bottom: 1rem;
}

.setup-section ul,
.setup-section ol {
  margin: 0.4rem 0 0.2rem 1.15rem;
  padding: 0;
}

.steps li {
  margin-bottom: 0.35rem;
}

.os-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.shot {
  margin: 0.75rem 0 0;
  border: 1px solid var(--rule);
  background: var(--paper-warm);
  padding: 0.7rem;
}

.shot img {
  width: 100%;
  display: block;
  border: 1px solid var(--rule);
  background: var(--paper);
}

.shot figcaption {
  margin-top: 0.5rem;
  color: var(--ink-soft);
  font-size: 0.82rem;
}

@media (max-width: 680px) {
  .top-nav {
    align-items: flex-start;
  }

  .nav-links {
    width: 100%;
  }
}