:root {
  color-scheme: light dark;
  --bg: #faf9f7;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --border: #e4e0d8;
  --accent: #2d4a3e;
  --accent-soft: #e8f0ec;
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  line-height: 1.65;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121210;
    --surface: #1c1c18;
    --text: #f2efe8;
    --muted: #a39e94;
    --border: #3a3830;
    --accent: #a8c9b8;
    --accent-soft: #243028;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
}

.wrap {
  max-width: 42rem;
  margin: 0 auto;
  padding: clamp(1.25rem, 4vw, 2.5rem);
}

header {
  margin-bottom: 1.75rem;
}

header h1 {
  font-size: clamp(1.35rem, 3vw, 1.65rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.35rem;
}

header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

[role="tablist"] {
  display: flex;
  gap: 0.35rem;
  padding: 0.35rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 1.5rem;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

[role="tab"] {
  flex: 1;
  font: inherit;
  font-size: 0.95rem;
  padding: 0.65rem 1rem;
  border: none;
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

[role="tab"]:hover {
  color: var(--text);
}

[role="tab"][aria-selected="true"] {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

[role="tab"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

[role="tabpanel"] {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: clamp(1.25rem, 3vw, 2rem);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

[role="tabpanel"][data-active="true"] {
  display: block;
}

.prose {
  font-size: 1rem;
}

.prose h1 {
  font-size: 1.5rem;
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.prose h2 {
  font-size: 1.2rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.prose p {
  margin: 0.75rem 0;
}

.prose ul,
.prose ol {
  margin: 0.75rem 0;
  padding-left: 1.35rem;
}

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

.prose code {
  font-size: 0.9em;
  padding: 0.15em 0.4em;
  border-radius: 6px;
  background: var(--accent-soft);
}

.status {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 1rem;
}

.status.error {
  color: #b42318;
}

@media (prefers-color-scheme: dark) {
  .status.error {
    color: #fca5a5;
  }
}