/* ============================================================
   Wifi por dentro · estilos
   Colores como variables: claro por defecto, oscuro con el
   sistema o con el botón ◐ (data-theme en <html>).
   ============================================================ */

:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --surface-2: #f2f1ed;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;
  --accent-ink: #1c5cab;
  /* series: AP1, AP2, AP3, vecino (validado con el validador de paleta) */
  --s1: #2a78d6;
  --s2: #eb6834;
  --s3: #1baf7a;
  --s4: #eda100;
  --s5: #e87ba4;
  /* estados: siempre con icono + texto */
  --good: #0ca30c;
  --warning: #fab219;
  --serious: #ec835a;
  --critical: #d03b3b;
  --good-ink: #006300;
  --bad-ink: #b02a2a;
  --code-bg: #f0efec;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --surface-2: #232321;
    --ink: #f0efec;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;
    --accent-ink: #86b6ef;
    --s1: #3987e5;
    --s2: #d95926;
    --s3: #199e70;
    --s4: #c98500;
    --s5: #d55181;
    --good-ink: #0ca30c;
    --bad-ink: #e66767;
    --code-bg: #232321;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --surface-2: #232321;
  --ink: #f0efec;
  --ink-2: #c3c2b7;
  --muted: #898781;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --accent: #3987e5;
  --accent-ink: #86b6ef;
  --s1: #3987e5;
  --s2: #d95926;
  --s3: #199e70;
  --s4: #c98500;
  --s5: #d55181;
  --good-ink: #0ca30c;
  --bad-ink: #e66767;
  --code-bg: #232321;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--accent-ink); }
code {
  font: 0.88em ui-monospace, "SFMono-Regular", Menlo, monospace;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}
pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  overflow-x: auto;
  font-size: 0.85em;
  line-height: 1.5;
}
pre code { background: none; padding: 0; }

/* ---------- barra superior ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: 1180px; margin: 0 auto; padding: 8px 16px;
  display: flex; align-items: center; gap: 16px;
}
.brand { font-weight: 700; text-decoration: none; color: var(--ink); white-space: nowrap; }
.brand span { color: var(--accent); }
.topnav { display: flex; gap: 2px; overflow-x: auto; flex: 1; scrollbar-width: none; }
.topnav::-webkit-scrollbar { display: none; }
.topnav a {
  text-decoration: none; color: var(--ink-2); font-size: 0.9rem;
  padding: 6px 10px; border-radius: 6px; white-space: nowrap;
}
.topnav a:hover { background: var(--surface-2); }
.topnav a.active { color: var(--ink); background: var(--surface-2); font-weight: 600; }
#theme-toggle {
  border: 1px solid var(--border); background: var(--surface); color: var(--ink);
  border-radius: 6px; width: 34px; height: 34px; cursor: pointer; font-size: 1rem;
}

/* ---------- maquetación ---------- */
.layout {
  max-width: 1180px; margin: 0 auto; padding: 24px 16px 80px;
  display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 40px;
}
main { min-width: 0; }
.toc { position: sticky; top: 70px; align-self: start; font-size: 0.88rem; }
.toc h4 { margin: 0 0 8px; color: var(--muted); font-weight: 600; text-transform: uppercase; font-size: 0.75rem; letter-spacing: 0.05em; }
.toc ol { margin: 0; padding-left: 18px; color: var(--muted); }
.toc li { margin: 4px 0; }
.toc a { color: var(--ink-2); text-decoration: none; }
.toc a:hover { color: var(--ink); text-decoration: underline; }
@media (max-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .toc { display: none; }
}

h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); line-height: 1.15; margin: 8px 0 12px; }
h2 { font-size: 1.5rem; margin: 56px 0 12px; padding-top: 8px; border-top: 1px solid var(--border); }
h3 { font-size: 1.15rem; margin: 28px 0 8px; }
.lead { font-size: 1.15rem; color: var(--ink-2); max-width: 70ch; }
p, li { max-width: 75ch; }

.tag {
  display: inline-block; font-size: 0.75rem; font-weight: 600; letter-spacing: 0.04em;
  text-transform: uppercase; color: var(--accent-ink);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  padding: 3px 8px; border-radius: 999px;
}

/* ---------- tarjetas y cajas ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin: 24px 0; }
.card {
  display: block; text-decoration: none; color: var(--ink);
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px;
  transition: transform 0.12s, border-color 0.12s;
}
.card:hover { transform: translateY(-2px); border-color: var(--accent); }
.card h3 { margin: 6px 0 4px; }
.card p { margin: 0; color: var(--ink-2); font-size: 0.93rem; }
.card .num { font-size: 0.8rem; color: var(--muted); font-weight: 600; }

.box {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 18px; margin: 18px 0;
}
.box > :first-child { margin-top: 0; }
.box > :last-child { margin-bottom: 0; }
.key { border-left: 4px solid var(--accent); }
.key strong:first-child { color: var(--accent-ink); }
.warn { border-left: 4px solid var(--warning); }
.lab { border-left: 4px solid var(--s3); }
.lab::before { content: "🧪 En el laboratorio"; display: block; font-weight: 700; font-size: 0.85rem; color: var(--ink-2); margin-bottom: 4px; }

.two { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }

/* ---------- tablas ---------- */
.table-wrap { overflow-x: auto; margin: 16px 0; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: 0.92rem; }
th, td { padding: 8px 12px; text-align: left; border-bottom: 1px solid var(--grid); vertical-align: top; }
th { background: var(--surface-2); font-weight: 600; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td.n, th.n { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
tr.hl td { background: color-mix(in srgb, var(--accent) 9%, transparent); font-weight: 600; }

/* ---------- estados (icono + texto, nunca solo color) ---------- */
.st { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.st::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: currentColor; flex: none; }
.st-good::before { background: var(--good); }
.st-ok::before { background: var(--warning); }
.st-bad::before { background: var(--serious); }
.st-none::before { background: var(--critical); }

/* ---------- gráficas ---------- */
figure.chart, figure.diagram {
  margin: 20px 0; background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px 16px 10px;
}
figure .ch-title { font-weight: 650; font-size: 1rem; margin: 0; }
figure .ch-sub { color: var(--ink-2); font-size: 0.88rem; margin: 2px 0 10px; }
figure figcaption { color: var(--ink-2); font-size: 0.86rem; margin-top: 8px; }
.chart-svg { width: 100%; height: auto; display: block; overflow: visible; touch-action: pan-y; }
.chart-svg text { fill: var(--muted); font-size: 12px; font-family: inherit; }
.chart-svg .lbl { fill: var(--ink-2); font-size: 12px; }
.chart-svg .lbl-strong { fill: var(--ink); font-size: 12.5px; font-weight: 600; }
.chart-svg .grid { stroke: var(--grid); stroke-width: 1; }
.chart-svg .axis { stroke: var(--axis); stroke-width: 1; }
.chart-svg .ref { stroke: var(--ink-2); stroke-width: 1; opacity: 0.55; }
.chart-svg .cross { stroke: var(--ink-2); stroke-width: 1; }
.chart-svg .line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart-svg .dot { stroke: var(--surface); stroke-width: 2; }
.chart-svg .bar { transition: opacity 0.1s; }
.chart-svg .bar.dim { opacity: 0.45; }
.chart-svg .band { opacity: 0.09; }

.legend { display: flex; flex-wrap: wrap; gap: 6px 16px; margin: 0 0 8px; font-size: 0.86rem; color: var(--ink-2); }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { display: inline-block; flex: none; }
.legend i.k-line { width: 16px; height: 2px; border-radius: 2px; }
.legend i.k-rect { width: 10px; height: 10px; border-radius: 2px; }

.tooltip {
  position: fixed; z-index: 50; pointer-events: none;
  background: var(--surface); color: var(--ink); border: 1px solid var(--border);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.14); border-radius: 8px;
  padding: 8px 10px; font-size: 0.82rem; min-width: 130px; display: none;
}
.tooltip .tt-h { color: var(--ink-2); margin-bottom: 4px; }
.tooltip .tt-r { display: flex; align-items: center; gap: 8px; }
.tooltip .tt-r i { width: 12px; height: 2px; border-radius: 2px; flex: none; }
.tooltip .tt-r b { font-variant-numeric: tabular-nums; }
.tooltip .tt-r span { color: var(--ink-2); }

details.data { margin-top: 6px; font-size: 0.85rem; }
details.data summary { cursor: pointer; color: var(--ink-2); }
details.data .table-wrap { margin: 8px 0 0; max-height: 320px; overflow: auto; }

/* ---------- controles ---------- */
.controls { display: flex; flex-wrap: wrap; gap: 10px 22px; align-items: center; margin: 4px 0 12px; font-size: 0.9rem; }
.controls label { display: flex; align-items: center; gap: 8px; color: var(--ink-2); }
.controls output { font-weight: 650; color: var(--ink); min-width: 4.5ch; font-variant-numeric: tabular-nums; }
input[type="range"] { accent-color: var(--accent); width: 170px; max-width: 45vw; }
select, input[type="text"] {
  font: inherit; font-size: 0.9rem; color: var(--ink); background: var(--surface);
  border: 1px solid var(--border); border-radius: 6px; padding: 5px 8px; max-width: 100%;
}
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.seg button {
  font: inherit; font-size: 0.85rem; border: 0; background: var(--surface); color: var(--ink-2);
  padding: 6px 11px; cursor: pointer; border-right: 1px solid var(--border);
}
.seg button:last-child { border-right: 0; }
.seg button.on { background: var(--accent); color: #fff; }

/* ---------- tarjetas de cifras ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin: 10px 0; }
.stat { background: var(--surface-2); border-radius: 10px; padding: 10px 12px; }
.stat .s-l { font-size: 0.8rem; color: var(--ink-2); }
.stat .s-v { font-size: 1.45rem; font-weight: 650; line-height: 1.2; }
.stat .s-d { font-size: 0.8rem; color: var(--ink-2); }

/* ---------- diagramas SVG estáticos ---------- */
.diagram svg { width: 100%; height: auto; display: block; }
.diagram svg text { fill: var(--ink); font-size: 13px; font-family: inherit; }
.diagram svg text.m { fill: var(--ink-2); font-size: 12px; }
.diagram svg text.w { fill: #fff; font-weight: 600; }
.diagram svg .b { fill: var(--surface-2); stroke: var(--axis); stroke-width: 1; }
.diagram svg .ln { stroke: var(--ink-2); stroke-width: 1.5; fill: none; }
.diagram svg .ln-s { stroke: var(--muted); stroke-width: 1; fill: none; }

/* ---------- escala de dBm ---------- */
.dbm-scale { display: grid; grid-template-columns: repeat(6, 1fr); gap: 2px; margin: 12px 0 4px; border-radius: 8px; overflow: hidden; font-size: 0.8rem; }
.dbm-scale div { padding: 8px 6px; color: #fff; font-weight: 600; text-align: center; }
.dbm-scale small { display: block; font-weight: 400; opacity: 0.92; }
@media (max-width: 560px) { .dbm-scale { grid-template-columns: repeat(3, 1fr); } }

.footer { color: var(--muted); font-size: 0.85rem; margin-top: 60px; border-top: 1px solid var(--border); padding-top: 16px; }
.next { display: flex; justify-content: space-between; gap: 10px; margin-top: 48px; flex-wrap: wrap; }
.next a { text-decoration: none; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px; }
.next a:hover { border-color: var(--accent); }

@media (max-width: 560px) {
  body { font-size: 16px; }
  figure.chart, figure.diagram { padding: 12px 10px 8px; }
  th, td { padding: 6px 8px; }
}

@media (forced-colors: active) {
  .chart-svg .line { stroke: CanvasText; }
}

/* En móvil los diagramas no se encogen hasta ser ilegibles: se desplazan dentro de su caja */
@media (max-width: 640px) {
  figure.diagram { overflow-x: auto; }
  figure.diagram svg { min-width: 620px; }
}