:root {
  color-scheme: dark;
  --accent: #ff6a00;
}

body {
  margin: 0;
  padding: 0;
  background: #000;
  color: #fff;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial,
    "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.5;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 72px 20px 64px;
}

h1 {
  font-size: 2.1rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}

.subtitle {
  font-size: 1.15rem;
  margin: 0;
  color: #cfcfcf;
}

.hero {
  text-align: center;
}

.hero-cta {
  margin: 18px 0 0;
}

.cta-button {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #000;
  font-weight: 750;
  letter-spacing: -0.01em;
}

.cta-button:hover,
.cta-button:focus {
  background: transparent;
  color: #fff;
  text-decoration: none;
}

.logo {
  display: block;
  height: 80px;
  max-height: 80px;
  width: auto;
  margin: 0 auto 14px;
}

.section {
  margin-top: 28px;
}

.description {
  margin: 0;
  color: #cfcfcf;
  max-width: 860px;
}

h2 {
  margin: 0 0 12px;
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: #fff;
}

a {
  color: #fff;
  text-decoration: none;
}

a:hover,
a:focus {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.back {
  display: inline-block;
  margin-bottom: 22px;
  color: #cfcfcf;
  font-size: 0.98rem;
}

.link-list {
  margin: 12px 0 0;
  padding-left: 18px;
  color: #cfcfcf;
}

.link-list li {
  margin: 6px 0;
}

.cards {
  margin-top: 34px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  max-width: 740px;
}

.card {
  display: block;
  padding: 16px 16px;
  border: 1px solid #222;
  border-radius: 12px;
  background: #0b0b0b;
  color: #fff;
}

.card-title {
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card-desc {
  margin-top: 6px;
  color: #cfcfcf;
}

.card:hover,
.card:focus {
  border-color: var(--accent);
  background: #111;
  text-decoration: none;
}

.footer {
  margin-top: 38px;
  padding-top: 18px;
  border-top: 1px solid #1a1a1a;
  color: #cfcfcf;
}

/* Markdown pages (e.g., docs/architecture/*) */
.markdown {
  color: #cfcfcf;
}

.markdown h1,
.markdown h2,
.markdown h3 {
  color: #fff;
}

.markdown p {
  margin: 0 0 12px;
}

.markdown ul,
.markdown ol {
  margin: 10px 0 14px;
  padding-left: 18px;
}

.markdown li {
  margin: 6px 0;
}

.markdown code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  font-size: 0.95em;
}

.markdown pre {
  margin: 12px 0 16px;
  padding: 12px;
  border: 1px solid #1a1a1a;
  border-radius: 12px;
  background: #0b0b0b;
  overflow: auto;
}

.markdown pre code {
  font-size: 0.92em;
}

.markdown table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 18px;
  background: #0b0b0b;
  border: 1px solid #1a1a1a;
  border-radius: 12px;
  overflow: hidden;
}

.markdown th,
.markdown td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid #1a1a1a;
  vertical-align: top;
}

.markdown th {
  color: #fff;
  font-weight: 700;
}

.markdown tr:last-child td {
  border-bottom: 0;
}

@media (max-width: 560px) {
  .cards {
    grid-template-columns: 1fr;
  }
}