/* Layout: una columna de lectura de 72ch con bandas de color por sección; tarjetas solo para fichas y prompts. */
:root {
  --bg: #F7F5F0;
  --bg-band: #EFEBE3;
  --surface: #FFFFFF;
  --fg: #1F2A37;
  --fg-muted: #4A5568;
  --fg-faint: #8A8F99;
  --line: #E3DED4;
  --accent: #C8692B;
  --accent-soft: #E8A775;
  --ink: #1F2A37;
  --ink-fg: #F7F5F0;
  --ok: #3E8E5A;
  --font-display: 'Libre Baskerville', Georgia, serif;
  --font-body: 'Public Sans', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #171E28; --bg-band: #1F2A37; --surface: #243141; --fg: #F7F5F0; --fg-muted: #C3CAD3; --fg-faint: #9AA5B1;
    --line: #34435A; --accent: #E8A775; --accent-soft: #C8692B; --ink: #0F141B; --ink-fg: #F7F5F0; --ok: #9FD3A0; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #171E28; --bg-band: #1F2A37; --surface: #243141; --fg: #F7F5F0; --fg-muted: #C3CAD3; --fg-faint: #9AA5B1;
  --line: #34435A; --accent: #E8A775; --accent-soft: #C8692B; --ink: #0F141B; --ink-fg: #F7F5F0; --ok: #9FD3A0; color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: var(--font-body); font-size: 17px; line-height: 1.55; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 400; line-height: 1.15; text-wrap: balance; margin: 0; }
h1 { font-size: clamp(2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: 1.25rem; }
p { margin: 0; }
.wrap { max-width: 1040px; margin-inline: auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.eyebrow { font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.muted { color: var(--fg-muted); }
.faint { color: var(--fg-faint); font-size: 0.9rem; }

/* Cabecera */
header.top { border-bottom: 1px solid var(--line); background: var(--bg); position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 14px; flex-wrap: wrap; }
.brand { font-family: var(--font-display); font-size: 1.2rem; color: var(--fg); text-decoration: none; }
.brand span { color: var(--accent); }
nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 18px; flex-wrap: wrap; }
nav a { color: var(--fg-muted); text-decoration: none; font-size: 0.95rem; }
nav a:hover { color: var(--fg); }

/* Portada */
.hero .wrap { padding-block: 56px 48px; display: grid; gap: 20px; max-width: 760px; margin-inline: auto; }
.hero p.lead { font-size: 1.2rem; color: var(--fg-muted); max-width: 60ch; }

/* Secciones */
section.block .wrap { padding-block: 48px; display: grid; gap: 24px; }
section.band { background: var(--bg-band); }
section.ink { background: var(--ink); color: var(--ink-fg); }
section.ink .muted { color: #BFC7D1; }
section.ink .eyebrow { color: var(--accent-soft); }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 20px; display: grid; gap: 10px; align-content: start; min-width: 0; }
.card.ink { background: var(--ink); color: var(--ink-fg); border-color: transparent; }
.card .n { font-family: var(--font-display); font-size: 2rem; color: var(--accent); line-height: 1; }
.card h3 { font-family: var(--font-body); font-weight: 600; font-size: 1.05rem; }
.card p { color: var(--fg-muted); font-size: 0.95rem; }
.card.ink p { color: #BFC7D1; }
.card a.more { font-size: 0.9rem; }
.status { display: inline-block; font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; padding: 3px 9px; border-radius: 999px; border: 1px solid var(--line); color: var(--fg-faint); width: max-content; }
.status.done { color: var(--ok); border-color: var(--ok); }
.status.next { color: var(--accent); border-color: var(--accent); }

/* Prompts */
.prompt { background: var(--surface); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 8px; padding: 16px 18px; display: grid; gap: 8px; min-width: 0; }
.prompt .meta { display: flex; justify-content: space-between; gap: 12px; align-items: center; flex-wrap: wrap; }
.prompt .meta h3 { font-family: var(--font-body); font-size: 1rem; font-weight: 600; }
.prompt pre { margin: 0; white-space: pre-wrap; font-family: var(--font-mono); font-size: 0.88rem; line-height: 1.5; color: var(--fg); }
.prompt button { font: inherit; font-size: 0.85rem; padding: 6px 12px; border-radius: 6px; border: 1px solid var(--line); background: transparent; color: var(--fg-muted); cursor: pointer; }
.prompt button:hover { border-color: var(--accent); color: var(--accent); }

/* Tablas y listas */
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; color: var(--fg-muted); font-size: 0.85rem; letter-spacing: 0.04em; text-transform: uppercase; }
ol.steps { margin: 0; padding-left: 1.3em; display: grid; gap: 10px; }
ul.plain { margin: 0; padding-left: 1.2em; display: grid; gap: 8px; }

/* Ficha de sesión */
article.ficha .wrap { padding-block: 48px; display: grid; gap: 32px; max-width: 760px; }
article.ficha section { display: grid; gap: 12px; }
.callout { background: var(--bg-band); border-radius: 12px; padding: 18px 20px; display: grid; gap: 8px; }
.breadcrumb { font-size: 0.9rem; color: var(--fg-faint); }

footer { border-top: 1px solid var(--line); }
footer .wrap { padding-block: 28px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; color: var(--fg-faint); font-size: 0.9rem; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }