/* Bitácora de vuelo — hoja compartida
   Acento magenta de carta seccional, ámbar para avisos.
   Todo color pasa por token: no meter literales en los componentes. */

:root {
  --bg: #f4f1f4;
  --surface: #ffffff;
  --surface-2: #faf8fa;
  --ink: #1a181d;
  --muted: #6d6672;
  --rule: #ded6de;
  --rule-soft: #ebe5eb;
  --accent: #a8156f;
  --accent-soft: #f8e6f1;
  --warn: #9c5c00;
  --warn-soft: #fbeedb;
  --key-bg: #ffffff;
  --key-ink: #2c2830;

  --display: "Barlow Condensed", "Helvetica Neue", Arial, sans-serif;
  --body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #131118;
    --surface: #1c1a23;
    --surface-2: #211e2a;
    --ink: #ece7ef;
    --muted: #978fa1;
    --rule: #322d3c;
    --rule-soft: #272232;
    --accent: #ff6ab8;
    --accent-soft: #38132c;
    --warn: #e5a344;
    --warn-soft: #362611;
    --key-bg: #272231;
    --key-ink: #e6e0ea;
  }
}

:root[data-theme="dark"] {
  --bg: #131118;
  --surface: #1c1a23;
  --surface-2: #211e2a;
  --ink: #ece7ef;
  --muted: #978fa1;
  --rule: #322d3c;
  --rule-soft: #272232;
  --accent: #ff6ab8;
  --accent-soft: #38132c;
  --warn: #e5a344;
  --warn-soft: #362611;
  --key-bg: #272231;
  --key-ink: #e6e0ea;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding-inline: 20px;
  padding-block: 32px 64px;
}
.wrap.narrow { max-width: 720px; }

/* ---- barra superior ---- */
.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 20px;
  padding-bottom: 14px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--rule);
}
.topbar .brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}
.topbar nav {
  display: flex;
  gap: 16px;
  margin-left: auto;
  font-size: 13.5px;
}
.topbar nav a { color: var(--muted); text-decoration: none; }
.topbar nav a:hover,
.topbar nav a[aria-current="page"] { color: var(--accent); }

a { color: var(--accent); text-underline-offset: 2px; }

/* ---- cabeceras ---- */
.eyebrow {
  font-family: var(--display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 6px;
}

h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(38px, 7vw, 60px);
  line-height: 0.95;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin: 0;
  text-wrap: balance;
}

h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: 0.01em;
  margin: 40px 0 10px;
  text-wrap: balance;
}

h3 {
  font-family: var(--body);
  font-weight: 600;
  font-size: 16.5px;
  margin: 26px 0 6px;
}

.lede {
  font-size: 18px;
  color: var(--muted);
  margin: 14px 0 0;
  max-width: 62ch;
}

.meta {
  margin: 16px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
}
.meta span { white-space: nowrap; }

.prose { max-width: 66ch; }
.prose p { margin: 0 0 16px; }
.prose ul { margin: 0 0 16px; padding-left: 20px; }
.prose li { margin-bottom: 6px; }
.prose strong { font-weight: 600; }

/* ---- tablas ---- */
.tablebox { overflow-x: auto; margin: 0 0 20px; }
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 14.5px;
}
th, td {
  text-align: left;
  padding: 8px 14px 8px 0;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
}
th {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--muted);
  border-bottom-color: var(--rule);
}
td.num { font-variant-numeric: tabular-nums; }

/* ---- teclas ---- */
.k {
  display: inline-block;
  font-family: var(--mono);
  font-weight: 500;
  font-size: 11.5px;
  line-height: 1.35;
  padding: 2px 6px;
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: 3px;
  background: var(--key-bg);
  color: var(--key-ink);
  white-space: nowrap;
}
.k + .k { margin-left: 3px; }
.k.hot { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.sep { color: var(--muted); font-size: 11px; padding-inline: 1px; }

/* ---- bloques ---- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 16px;
  align-items: start;
}

section.block {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 18px 18px 14px;
}
section.block > h2 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin: 0 0 2px;
}
.sub { margin: 0 0 14px; font-size: 12.5px; color: var(--muted); }

dl {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(6.5rem, max-content) 1fr;
  column-gap: 16px;
}
dl > dt, dl > dd {
  margin: 0;
  padding-block: 7px;
  border-top: 1px solid var(--rule-soft);
}
dl > dt:first-of-type, dl > dt:first-of-type + dd { border-top: 0; }
dd { font-size: 13.5px; }
dd em { font-style: normal; color: var(--muted); }

.note {
  margin: 14px 0 0;
  padding: 11px 12px;
  background: var(--surface-2);
  border: 1px solid var(--rule-soft);
  border-radius: 3px;
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.45;
}
.note strong { color: var(--ink); font-weight: 600; }

section.warn { border-color: var(--warn); background: var(--warn-soft); }
section.warn > h2 { color: var(--warn); }
section.warn dt, section.warn dd { border-top-color: color-mix(in srgb, var(--warn) 25%, transparent); }
section.warn .k { background: transparent; border-color: color-mix(in srgb, var(--warn) 45%, transparent); }

/* ---- el bucle ---- */
.loop {
  margin-top: 28px;
  border: 1px solid var(--rule);
  background: var(--surface);
  border-radius: 3px;
  padding: 18px 20px;
}
.loop h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 600;
  color: var(--muted);
  margin: 0 0 14px;
}
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 4px;
}
.steps li { display: flex; align-items: center; gap: 4px; flex: 1 1 150px; }
.step { flex: 1; min-width: 0; }
.step .k { margin-bottom: 5px; }
.step p { margin: 0; font-size: 13px; color: var(--muted); line-height: 1.35; }
.arrow { font-family: var(--mono); color: var(--accent); font-size: 15px; flex: 0 0 auto; padding-inline: 4px; }
.steps li:last-child .arrow { display: none; }

/* ---- lista de vuelos ---- */
.flights { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.flight {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 4px 18px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 16px 18px;
}
.flight .no {
  font-family: var(--display);
  font-weight: 700;
  font-size: 30px;
  line-height: 1;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.flight h3 { margin: 0 0 4px; font-size: 19px; font-family: var(--display); font-weight: 700; text-transform: uppercase; letter-spacing: 0.02em; }
.flight h3 a { color: var(--ink); text-decoration: none; }
.flight h3 a:hover { color: var(--accent); }
.flight p { margin: 0 0 8px; font-size: 14px; color: var(--muted); }
.flight .facts { font-family: var(--mono); font-size: 11.5px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 4px 14px; }
.flight .body { grid-column: 2; }

/* ---- figura ---- */
figure { margin: 24px 0; }
figure img { border: 1px solid var(--rule); border-radius: 3px; display: block; }
figcaption { margin-top: 8px; font-size: 13px; color: var(--muted); }

/* ---- tarjetas de estado ---- */
.stats { display: flex; flex-wrap: wrap; gap: 28px; margin: 22px 0 0; }
.stat .v { font-family: var(--display); font-weight: 700; font-size: 34px; line-height: 1; font-variant-numeric: tabular-nums; }
.stat .l { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; font-family: var(--display); font-weight: 600; }

footer.pagefoot {
  margin-top: 46px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  color: var(--muted);
}
footer.pagefoot p { margin: 0 0 6px; }
footer.pagefoot p:last-child { margin-bottom: 0; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

@media (max-width: 460px) {
  dl { grid-template-columns: 1fr; }
  dl > dt { padding-bottom: 2px; }
  dl > dt + dd { border-top: 0; padding-top: 0; }
  .flight { grid-template-columns: 1fr; }
  .flight .body { grid-column: 1; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* ---- foto anotada ----
   Los marcadores viven sobre una fotografía, que no cambia con el tema.
   Por eso sus colores son fijos y tienen token propio, en lugar de heredar
   los de la interfaz: deben leerse igual en claro y en oscuro. */
:root {
  --pin-ring: rgba(255, 255, 255, 0.92);
  --pin-shadow: rgba(0, 0, 0, 0.55);
  --pin-ref-bg: rgba(255, 255, 255, 0.92);
  --pin-ref-ink: #1a181d;
  --pin-pt-bg: #a8156f;
  --pin-pt-ink: #ffffff;
}

.annotated { position: relative; display: block; line-height: 0; }
.annotated img { display: block; }

.pin {
  position: absolute;
  transform: translate(-50%, -50%);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 11px;
  line-height: 1;
  letter-spacing: 0;
}
.pin.pt {
  background: var(--pin-pt-bg);
  color: var(--pin-pt-ink);
  box-shadow: 0 0 0 2px var(--pin-ring), 0 1px 5px var(--pin-shadow);
}
.pin.ref {
  background: var(--pin-ref-bg);
  color: var(--pin-ref-ink);
  width: 20px;
  height: 20px;
  font-size: 10px;
  box-shadow: 0 1px 4px var(--pin-shadow);
}

.annot-legend {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 6px 22px;
  font-size: 13.5px;
  line-height: 1.4;
}
.annot-legend li { display: grid; grid-template-columns: 1.7rem 1fr; align-items: baseline; }
.annot-legend .n {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 11.5px;
  color: var(--accent);
}
.annot-legend .n.ref { color: var(--muted); }
.annot-legend .est { color: var(--muted); font-size: 12.5px; }

/* crédito de imagen dentro del pie de figura */
.credito {
  display: block;
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.4;
  color: var(--muted);
}
.credito a { color: inherit; }
.prose figure { margin: 22px 0 26px; }

/* fórmulas y ecuaciones en las páginas de conceptos */
.formula {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 2;
  background: var(--surface-2);
  border: 1px solid var(--rule-soft);
  border-left: 3px solid var(--accent);
  border-radius: 3px;
  padding: 14px 16px;
  margin: 0 0 16px;
  overflow-x: auto;
}
.formula .gloss { color: var(--muted); }

/* ---- perfil de terreno (svg en línea) ---- */
.perfil { margin: 20px 0 24px; background: var(--surface); border: 1px solid var(--rule); border-radius: 3px; padding: 14px 12px 8px; }
.perfil svg { display: block; width: 100%; height: auto; }
.perfil .tierra { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 1.5; }
.perfil .lado { fill: none; stroke: var(--muted); stroke-width: 1; stroke-dasharray: 3 3; }
.perfil .nivel { stroke: var(--rule); stroke-width: 1; }
.perfil .ruta { stroke: var(--warn); stroke-width: 1.5; stroke-dasharray: 6 4; }
.perfil text { font-family: var(--mono); font-size: 10px; fill: var(--muted); }
.perfil text.hito { fill: var(--ink); font-family: var(--display); font-weight: 600; font-size: 12px; }
.perfil text.lado { fill: var(--muted); font-family: var(--display); font-weight: 500; font-size: 12px; }
.perfil .traza { fill: none; stroke: var(--accent); stroke-width: 2; stroke-linejoin: round; }
.perfil circle.pt { fill: var(--accent); stroke: var(--surface); stroke-width: 1.5; }
.perfil circle.lado { fill: var(--surface); stroke: var(--muted); stroke-width: 1.5; }