/* Estilos comunes a todas las páginas del cuaderno. */

:root {
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --bg: #f6f6f3;
  --surface: #ffffff;
  --surface-2: #f0f0eb;
  --border: #e1e1da;
  --border-strong: #c9c9c0;
  --text: #1b1c1e;
  --text-muted: #5d6066;
  --accent: #2856c3;
  --accent-soft: #e5ecfb;
  --on-accent: #ffffff;
  --good: #1f8a4c;
  --bad: #c43d1c;
  --warn: #b7791f;

  --plot-bg: #ffffff;
  --grid: #ececE6;
  --axis: #a3a39b;
  --field: #a7aab0;

  /* paleta de series de las gráficas */
  --s1: #2856c3;
  --s2: #d9480f;
  --s3: #2f9e44;
  --s4: #9c36b5;
  --s5: #0c8599;
  --s6: #e09100;

  --radius: 10px;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.05), 0 2px 8px rgb(0 0 0 / 0.04);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111214;
    --surface: #1a1b1e;
    --surface-2: #222327;
    --border: #2d2f33;
    --border-strong: #42454b;
    --text: #e7e7e4;
    --text-muted: #a0a3a9;
    --accent: #7ea3ff;
    --accent-soft: #1f2a44;
    --on-accent: #0d1424;
    --good: #5bd08a;
    --bad: #ff8466;
    --warn: #f0b955;
    --plot-bg: #16171a;
    --grid: #25272b;
    --axis: #5d6067;
    --field: #565a61;
    --s1: #7ea3ff;
    --s2: #ff8c52;
    --s3: #5fd07a;
    --s4: #d48cf0;
    --s5: #3fc5d6;
    --s6: #ffc145;
    --shadow: none;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #111214;
  --surface: #1a1b1e;
  --surface-2: #222327;
  --border: #2d2f33;
  --border-strong: #42454b;
  --text: #e7e7e4;
  --text-muted: #a0a3a9;
  --accent: #7ea3ff;
  --accent-soft: #1f2a44;
  --on-accent: #0d1424;
  --good: #5bd08a;
  --bad: #ff8466;
  --warn: #f0b955;
  --plot-bg: #16171a;
  --grid: #25272b;
  --axis: #5d6067;
  --field: #565a61;
  --s1: #7ea3ff;
  --s2: #ff8c52;
  --s3: #5fd07a;
  --s4: #d48cf0;
  --s5: #3fc5d6;
  --s6: #ffc145;
  --shadow: none;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 var(--font-sans);
}
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 0.5em; letter-spacing: -0.01em; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: 0.95rem; }
p { margin: 0 0 0.8em; }
code, kbd { font-family: var(--font-mono); font-size: 0.88em; }
kbd { border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 4px; padding: 0 4px; }
.muted { color: var(--text-muted); }
.small { font-size: 0.85rem; }

/* ---------- armazón: barra lateral + página ---------- */
body.shell { display: grid; grid-template-columns: var(--sidebar-w) minmax(0, 1fr); min-height: 100vh; }
:root { --sidebar-w: 300px; --mbar-h: 0px; }
.page { min-width: 0; grid-column: 2; }
.icon-btn {
  width: 34px;
  height: 34px;
  flex: none;
  display: inline-grid;
  place-items: center;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-size: 16px;
}
.icon-btn svg, .sb-search-icon svg, .sb-n svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.brand { font-weight: 650; color: var(--text); text-decoration: none; line-height: 1.2; }

.sidebar {
  grid-column: 1;
  grid-row: 1 / span 2;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 14px 10px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.88rem;
  scrollbar-width: thin;
}
.sb-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 0 6px; }
.sb-head .brand { display: grid; font-size: 1rem; }
.sb-head .brand span { font-weight: 400; font-size: 0.78rem; color: var(--text-muted); }
.sb-search { position: relative; display: flex; align-items: center; }
.sb-search input {
  width: 100%;
  padding: 8px 34px 8px 32px;
  border-radius: 9px;
  background: var(--surface-2);
  border-color: var(--border);
}
.sb-search-icon { position: absolute; left: 9px; color: var(--text-muted); display: inline-flex; pointer-events: none; }
.sb-search-icon svg { width: 16px; height: 16px; }
.sb-search kbd { position: absolute; right: 9px; color: var(--text-muted); font-size: 0.72rem; pointer-events: none; }
.sb-search input:focus ~ kbd { display: none; }
.sb-search input::-webkit-search-cancel-button { display: none; }

.sb-tree, .sb-results {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-bottom: 40px;
  margin: 0 -10px;
  padding-inline: 10px;
}
.sb-tree { display: grid; gap: 2px; align-content: start; }
.sb-results { align-content: start; }
.sb-link {
  display: flex;
  gap: 8px;
  align-items: baseline;
  padding: 5px 8px;
  border-radius: 7px;
  color: var(--text);
  text-decoration: none;
  line-height: 1.35;
}
.sb-link:hover { background: var(--surface-2); }
.sb-link.current { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.sb-home { font-weight: 550; margin-bottom: 4px; }
.sb-group > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 7px;
  font-weight: 600;
  user-select: none;
}
.sb-group > summary::-webkit-details-marker { display: none; }
.sb-group > summary::after {
  content: "";
  margin-left: auto;
  width: 7px;
  height: 7px;
  border-right: 1.5px solid var(--text-muted);
  border-bottom: 1.5px solid var(--text-muted);
  transform: rotate(-45deg);
  transition: transform 0.15s;
  flex: none;
}
.sb-group[open] > summary::after { transform: rotate(45deg); }
.sb-group > summary:hover { background: var(--surface-2); }
.sb-group .sb-group { margin-left: 4px; }
.sb-group .sb-group > summary { font-weight: 500; }
.sb-cuatri {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  font-weight: 600;
  padding: 10px 8px 3px 12px;
}
.sb-asig { padding-left: 12px; }
.sb-asig.pending { color: var(--text-muted); }
.sb-asig.pending:hover { color: var(--text); }
.sb-asig-group > summary { padding-left: 12px; }
.sb-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--good); flex: none; }
.sb-conv {
  margin-left: auto;
  flex: none;
  font: 600 0.62rem/1 var(--font-mono);
  color: var(--s5);
  border: 1px solid color-mix(in srgb, var(--s5) 50%, transparent);
  border-radius: 4px;
  padding: 2px 4px;
  align-self: center;
}
.sb-conv.maybe { border-style: dashed; opacity: 0.8; }
.sb-group > summary .sb-conv { margin-left: 0; }
.sb-temas { display: grid; gap: 1px; padding: 2px 0 6px 18px; border-left: 1px solid var(--border); margin-left: 15px; }
.sb-n { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); min-width: 1.3em; display: inline-flex; }
.sb-n svg { width: 14px; height: 14px; }
.sb-link.current .sb-n { color: var(--accent); }
.sb-sections { list-style: none; margin: 2px 0 4px; padding: 0 0 0 26px; display: grid; gap: 1px; }
.sb-sections a { display: block; padding: 3px 8px; border-radius: 6px; color: var(--text-muted); text-decoration: none; font-size: 0.82rem; }
.sb-sections a:hover { color: var(--text); background: var(--surface-2); }
.sb-sections a.active { color: var(--accent); background: var(--accent-soft); }

.sb-results { display: grid; gap: 2px; }
.sb-results[hidden], .sb-tree[hidden] { display: none; }
.sb-hit { display: grid; gap: 1px; padding: 7px 9px; border-radius: 8px; color: var(--text); text-decoration: none; }
.sb-hit[aria-selected="true"] { background: var(--accent-soft); }
.sb-hit-type { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); font-weight: 600; }
.sb-hit-title { font-weight: 550; }
.sb-hit-sub { font-size: 0.78rem; color: var(--text-muted); }
.sb-hit mark { background: color-mix(in srgb, var(--warn) 30%, transparent); color: inherit; border-radius: 2px; }
.sb-empty { color: var(--text-muted); padding: 8px; }

.mbar, .scrim { display: none; }

@media (max-width: 960px) {
  :root { --mbar-h: 52px; }
  body.shell { display: block; }
  .mbar {
    display: flex;
    align-items: center;
    gap: 10px;
    position: sticky;
    top: 0;
    z-index: 30;
    height: var(--mbar-h);
    padding: 0 12px;
    background: color-mix(in srgb, var(--bg) 90%, transparent);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
  }
  .mbar .brand { flex: 1; }
  .sidebar {
    position: fixed;
    z-index: 50;
    left: 0;
    top: 0;
    width: min(88vw, 340px);
    transform: translateX(-102%);
    transition: transform 0.2s ease;
  }
  .scrim { position: fixed; inset: 0; z-index: 40; background: rgb(0 0 0 / 0.35); }
  body.menu-open .sidebar { transform: none; }
  body.menu-open .scrim { display: block; }
}

/* ---------- migas de pan y paginación ---------- */
.crumbs { display: flex; flex-wrap: wrap; gap: 4px 0; font-size: 0.82rem; color: var(--text-muted); margin-bottom: 14px; }
.crumbs > * + *::before { content: "/"; margin: 0 8px; color: var(--border-strong); }
.crumbs a { color: var(--text-muted); text-decoration: none; }
.crumbs a:hover { color: var(--accent); }
.crumbs .here { color: var(--text); }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 48px; }
.pager a {
  display: grid;
  gap: 2px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  text-decoration: none;
  color: var(--text);
}
.pager a:hover { border-color: var(--accent); }
.pager-next { text-align: right; grid-column: 2; }
.pager-dir { font-size: 0.78rem; color: var(--text-muted); }
.pager-title { font-weight: 600; color: var(--accent); }
@media (max-width: 600px) { .pager { grid-template-columns: 1fr; } .pager-next { grid-column: 1; } }

/* ---------- pestañas ---------- */
.page-tabs {
  position: sticky;
  top: var(--mbar-h);
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 8px 24px;
}
.tabs { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; }
.tabs button {
  border: 0;
  background: transparent;
  color: var(--text-muted);
  font: inherit;
  font-size: 0.92rem;
  padding: 7px 12px;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
}
.tabs button:hover { color: var(--text); background: var(--surface-2); }
.tabs button[aria-selected="true"] { color: var(--accent); background: var(--accent-soft); font-weight: 600; }

/* ---------- maquetación ---------- */
main { max-width: 1440px; margin: 0 auto; padding: 22px 24px 56px; }
@media (max-width: 600px) { main { padding: 16px 16px 48px; } }
.panel-intro { max-width: 820px; margin-bottom: 14px; }
.panel-intro p { color: var(--text-muted); }
.workspace { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 16px; align-items: start; }
.stack { display: grid; gap: 16px; min-width: 0; }
@media (max-width: 1000px) {
  .workspace { grid-template-columns: minmax(0, 1fr); }
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px;
  min-width: 0;
}
.card > h2, .card > h3 { margin-bottom: 10px; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.card-head h2, .card-head h3 { margin: 0; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 720px) { .grid-2 { grid-template-columns: minmax(0, 1fr); } }

canvas.plot { display: block; width: 100%; height: 220px; border-radius: 6px; touch-action: none; }
canvas.plot.tall { height: min(62vh, 560px); min-height: 320px; }
canvas.plot.square { aspect-ratio: 1 / 1; height: auto; max-height: 70vh; }
.readout { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-muted); min-height: 1.4em; margin-top: 6px; }

/* ---------- controles ---------- */
.controls { display: grid; gap: 12px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.btn {
  font: inherit;
  font-size: 0.88rem;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  border-radius: 8px;
  padding: 6px 11px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn.primary:hover { filter: brightness(1.08); }
.btn[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.btn.danger { color: var(--bad); }
.btn:disabled { opacity: 0.45; cursor: default; }
select, input[type="text"], input[type="number"] {
  font: inherit;
  font-size: 0.9rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  padding: 6px 8px;
  min-width: 0;
}
select { width: 100%; }
input:focus-visible, select:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.field { display: grid; gap: 4px; }
.field-label { font-size: 0.8rem; color: var(--text-muted); font-weight: 500; }
.section-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); font-weight: 600; margin: 4px 0 -4px; }

.slider { display: grid; gap: 2px; }
.slider-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.slider-label { font-size: 0.9rem; }
.slider-num { display: inline-flex; align-items: center; gap: 4px; }
.slider .num { width: 84px; padding: 2px 6px; text-align: right; font-family: var(--font-mono); font-size: 0.82rem; }
.slider .unit { font-size: 0.8rem; color: var(--text-muted); }
input[type="range"] { width: 100%; accent-color: var(--accent); margin: 2px 0; }
.check { display: inline-flex; align-items: center; gap: 6px; font-size: 0.9rem; cursor: pointer; }
.check input { accent-color: var(--accent); }

.expr-field { display: grid; gap: 4px; }
.expr-row { display: flex; align-items: center; gap: 8px; }
.expr-input { flex: 1; font-family: var(--font-mono) !important; }
.expr-input.invalid { border-color: var(--bad); }
.expr-preview { overflow-x: auto; min-height: 2.6em; }
.expr-preview .katex-display { margin: 0.3em 0; }
.expr-error { color: var(--bad); font-size: 0.82rem; min-height: 1em; }

.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { font-size: 0.78rem; border-radius: 99px; padding: 2px 9px; background: var(--surface-2); border: 1px solid var(--border); color: var(--text-muted); }
.chip.good { color: var(--good); }
.chip.bad { color: var(--bad); }
.chip.accent { color: var(--accent); background: var(--accent-soft); border-color: transparent; }

.legend { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 0.82rem; color: var(--text-muted); }
.legend-item { display: inline-flex; align-items: center; gap: 6px; }
.swatch { width: 16px; height: 0; border-top: 2.5px solid var(--c); display: inline-block; }
.swatch.dashed { border-top-style: dashed; }

/* ---------- texto teórico ---------- */
.theory { font-size: 0.92rem; }
.theory p, .theory li { color: var(--text); }
.theory ul { padding-left: 1.2em; margin: 0 0 0.8em; }
.theory .katex-display { margin: 0.6em 0; overflow-x: auto; overflow-y: hidden; }
details.theory > summary { cursor: pointer; font-weight: 600; margin-bottom: 6px; }
.note { background: var(--accent-soft); padding: 8px 12px; border-radius: 8px; font-size: 0.88rem; }
.card-head h2 { font-size: 0.95rem; }
.tex-fallback { font-family: var(--font-mono); font-size: 0.85em; }
.math-scroll { overflow-x: auto; overflow-y: hidden; }

table.data { border-collapse: collapse; width: 100%; font-size: 0.85rem; }
table.data th, table.data td { text-align: right; padding: 5px 8px; border-bottom: 1px solid var(--border); }
table.data th:first-child, table.data td:first-child { text-align: left; }
table.data th { color: var(--text-muted); font-weight: 500; }
table.data td { font-family: var(--font-mono); }