@import url('https://fonts.googleapis.com/css2?family=Alegreya:wght@400;500;700&family=Alegreya+Sans:wght@400;500;700&display=swap');

:root {
  --serif: "Alegreya", serif;
  --sans: "Alegreya Sans", system-ui, sans-serif;
  --bg: #fcfcfa;
  --fg: #111;
  --muted: #666;
  --line: #ddd;
  --accent: #c00;
  --accent-soft: rgba(204, 0, 0, 0.08);
  --area-ECH: #2563eb;
  --area-EAA: #16a34a;
  --area-FCT: #c026d3;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--serif);
  font-size: 16px;
  color: var(--fg);
  background: var(--bg);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== Portada (index.html) ===== */
.portada {
  max-width: 980px;
  margin: 0 auto;
  padding: 4rem 2rem;
}
.portada h1 {
  font-size: 2.4rem;
  font-weight: 700;
  margin: 0 0 0.5rem 0;
  letter-spacing: -0.01em;
}
.portada .subtitulo {
  font-family: var(--sans);
  font-size: 1.05rem;
  color: var(--muted);
  margin-bottom: 3rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.portada .sello {
  font-size: 1.15rem;
  line-height: 1.6;
  margin-bottom: 4rem;
}
.portada .sello .foco {
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
  margin-bottom: 0.6rem;
}
.tarjetas {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.tarjeta {
  border: 1px solid var(--line);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--fg);
  transition: border-color 0.15s, transform 0.15s;
  background: white;
}
.tarjeta:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.tarjeta h2 {
  font-size: 1.3rem;
  margin: 0 0 0.4rem 0;
}
.tarjeta .audiencia {
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}
.tarjeta p {
  font-size: 0.95rem;
  line-height: 1.5;
  margin: 0 0 1rem 0;
  flex-grow: 1;
}
.tarjeta .ir {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--accent);
}

@media (max-width: 720px) {
  .tarjetas { grid-template-columns: 1fr; }
}

/* ===== Layout de superficies (cartografia / narrativa / exploracion) ===== */
.surface {
  display: grid;
  grid-template-columns: 280px 1fr;
  grid-template-rows: 56px 1fr;
  height: 100vh;
  overflow: hidden;
}
.surface.no-sidebar {
  grid-template-columns: 1fr;
}

header.topbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 1.2rem;
  border-bottom: 1px solid var(--line);
  background: white;
}
header.topbar .titulo {
  font-weight: 700;
  font-size: 1.05rem;
}
header.topbar .titulo a { color: var(--fg); }
header.topbar .audiencia {
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 1em;
}
header.topbar .grow { flex-grow: 1; }
header.topbar input[type="search"] {
  width: 280px;
  padding: 0.4rem 0.7rem;
  font-family: var(--serif);
  font-size: 0.95rem;
  border: 1px solid var(--line);
  background: white;
}
header.topbar .home {
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--muted);
}

aside.controls {
  border-right: 1px solid var(--line);
  background: white;
  overflow-y: auto;
  padding: 1.2rem 1rem;
}
aside.controls h3 {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.6rem 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}
aside.controls h3:first-child {
  padding-top: 0;
  border-top: none;
}
aside.controls label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  margin: 0.3rem 0;
  cursor: pointer;
  user-select: none;
}
aside.controls label input { cursor: pointer; }
aside.controls .filter-group {
  margin: 0.3rem 0 0.6rem 0;
}
aside.controls select {
  width: 100%;
  padding: 0.3rem 0.4rem;
  font-family: var(--serif);
  font-size: 0.9rem;
  border: 1px solid var(--line);
  background: white;
}
aside.controls button.preset {
  display: block;
  width: 100%;
  padding: 0.5rem 0.8rem;
  margin: 0.3rem 0;
  font-family: var(--sans);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  background: white;
  border: 1px solid var(--line);
  cursor: pointer;
  text-align: left;
}
aside.controls button.preset:hover {
  border-color: var(--accent);
  color: var(--accent);
}
aside.controls .clear {
  display: block;
  margin: 1rem 0 0 0;
  padding: 0.4rem 0.8rem;
  font-family: var(--sans);
  font-size: 0.8rem;
  background: white;
  border: 1px solid var(--line);
  cursor: pointer;
  width: 100%;
}

main.canvas {
  position: relative;
  overflow: hidden;
}
main.canvas svg {
  width: 100%;
  height: 100%;
  display: block;
  background: var(--bg);
}

/* ===== Nodos y aristas ===== */
.node circle, .node rect {
  cursor: pointer;
  stroke: white;
  stroke-width: 1.5px;
  transition: opacity 0.2s;
}
.node text {
  font-family: var(--serif);
  font-size: 11px;
  fill: var(--fg);
  pointer-events: none;
  user-select: none;
}
.node.linea circle { fill: var(--accent); }
.node.sublinea circle { fill: #333; }
.node.investigador rect { fill: #888; }
.node.attenuated { opacity: 0.18; }
.node.highlighted circle, .node.highlighted rect {
  stroke: var(--accent);
  stroke-width: 3px;
}
.node.selected circle, .node.selected rect {
  stroke: var(--accent);
  stroke-width: 3.5px;
}

.edge {
  fill: none;
  stroke-opacity: 0.4;
}
.edge.jerarquica         { stroke: #444; stroke-width: 1.5; }
.edge.coautoria          { stroke: #888; stroke-width: 1; stroke-dasharray: 2 3; }
.edge.coinvestigacion    { stroke: #2a6f97; stroke-width: 1; }
.edge.sosten_lab         { stroke: #1f7a3a; stroke-width: 1.5; stroke-dasharray: 4 2; }
.edge.afinidad_lab       { stroke: #1f7a3a; stroke-width: 0.6; stroke-dasharray: 1 3; }
.edge.coincidencia_modo  { stroke: #b8860b; stroke-width: 0.6; stroke-dasharray: 1 4; }
.edge.proximidad_semantica { stroke: #c00; stroke-width: 1.2; stroke-opacity: 0.5; }
.edge.attenuated { stroke-opacity: 0.05; }

/* ===== Envolventes (regiones translúcidas) ===== */
.envolvente {
  fill-opacity: 0.10;
  stroke-opacity: 0.35;
  stroke-width: 1.5;
  pointer-events: none;
}
.envolvente.area-ECH    { fill: var(--area-ECH); stroke: var(--area-ECH); }
.envolvente.area-EAA    { fill: var(--area-EAA); stroke: var(--area-EAA); }
.envolvente.area-FCT    { fill: var(--area-FCT); stroke: var(--area-FCT); }
.envolvente.modo        { fill: #b8860b; stroke: #b8860b; fill-opacity: 0.06; stroke-dasharray: 4 4; }
.envolvente.salida      { fill: #1f7a3a; stroke: #1f7a3a; fill-opacity: 0.05; stroke-dasharray: 2 6; }

.envolvente-label {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  fill: currentColor;
  pointer-events: none;
}

/* ===== Tooltip ===== */
.tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(0, 0, 0, 0.85);
  color: white;
  padding: 0.4rem 0.7rem;
  font-family: var(--sans);
  font-size: 0.85rem;
  white-space: nowrap;
  z-index: 100;
  display: none;
}

/* ===== Side panel (detalle de nodo) ===== */
.detail-panel {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 360px;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  background: white;
  border: 1px solid var(--line);
  padding: 1.2rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  z-index: 50;
  display: none;
}
.detail-panel.visible { display: block; }
.detail-panel .close {
  position: absolute;
  top: 0.5rem;
  right: 0.7rem;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--muted);
  line-height: 1;
}
.detail-panel .kind {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.3rem;
}
.detail-panel h2 {
  font-size: 1.25rem;
  margin: 0 0 0.8rem 0;
}
.detail-panel .descripcion {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--fg);
  margin-bottom: 1rem;
}
.detail-panel dl {
  font-family: var(--sans);
  font-size: 0.85rem;
  margin: 0;
}
.detail-panel dt {
  color: var(--muted);
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  margin-top: 0.7rem;
}
.detail-panel dd {
  margin: 0.2rem 0 0 0;
  line-height: 1.4;
}
.detail-panel ul {
  margin: 0.2rem 0 0 0;
  padding-left: 1.2rem;
  font-size: 0.85rem;
  font-family: var(--serif);
}

/* ===== Loading state ===== */
.loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  z-index: 200;
}
.loading .sello-loader {
  max-width: 600px;
  padding: 2rem;
  font-style: italic;
  color: var(--muted);
  text-align: center;
  line-height: 1.6;
}

/* ===== Empty state ===== */
.empty-state {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  font-family: var(--sans);
  color: var(--muted);
  z-index: 30;
  pointer-events: none;
  display: none;
}
.empty-state.visible { display: block; pointer-events: auto; }
.empty-state button {
  margin-top: 1rem;
  padding: 0.4rem 1rem;
  font-family: var(--sans);
  border: 1px solid var(--line);
  background: white;
  cursor: pointer;
}