/* ══════════════════════════════════════════════════════════════
   PORTICO — Capa de rediseño v2 (se carga después de style.css)
   Portada institucional + refinamiento visual general
   ══════════════════════════════════════════════════════════════ */

/* ── Pulido general ─────────────────────────────────────────── */
::selection { background: var(--accent-soft); color: var(--text); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--bg4);
  border-radius: 6px;
  border: 2px solid var(--bg2);
}
::-webkit-scrollbar-thumb:hover { background: var(--border2); }

button:focus-visible, select:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* ── Menubar refinado ───────────────────────────────────────── */
#menubar {
  background: linear-gradient(180deg, var(--bg3), var(--bg2));
  border-bottom: 1px solid var(--border2);
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.12em;
  color: var(--text);
  margin-right: 20px;
}
.brand .brand-mark { width: 20px; height: 20px; flex-shrink: 0; }
.brand-sub {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  border: 1px solid var(--border2);
  border-radius: 99px;
  padding: 2px 7px;
}
.menu-label { font-size: 12.5px; }

/* ── Toolbar refinado ───────────────────────────────────────── */
.tool { border-radius: 10px; }
.tool.active {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent-dim);
  box-shadow: inset 0 0 12px rgba(56, 189, 248, 0.08);
}
.tool-run {
  color: var(--success);
  border: 1px solid rgba(74, 222, 128, 0.35);
  background: rgba(74, 222, 128, 0.07);
}
.tool-run:hover {
  background: rgba(74, 222, 128, 0.16);
  color: var(--success);
  box-shadow: 0 0 16px rgba(74, 222, 128, 0.18);
}

/* ── Overlays del viewport (vidrio) ─────────────────────────── */
.vp-ctrl {
  background: var(--glass);
  border: 1px solid var(--border2);
  border-radius: 9px;
  backdrop-filter: blur(10px) saturate(1.3);
  box-shadow: var(--shadow-sm);
}

/* ── Statusbar ──────────────────────────────────────────────── */
#statusbar {
  background: linear-gradient(0deg, var(--bg2), var(--bg3));
  border-top: 1px solid var(--border2);
}

/* ══════════════════════════════════════════════════════════════
   PORTADA — pantalla de bienvenida institucional
   ══════════════════════════════════════════════════════════════ */
/* Portada como VENTANA FLOTANTE pequeña: #landing es el telón (backdrop) que
   atenúa la app y centra una tarjeta compacta (.landing-card). */
#landing {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(1100px 520px at 50% -8%, rgba(56, 189, 248, 0.10), transparent 65%),
    rgba(6, 10, 16, 0.62);
  overflow: auto;
  transition: opacity 0.6s ease, filter 0.6s ease;
}
/* Tarjeta flotante compacta */
.landing-card {
  position: relative;
  z-index: 1;
  width: min(440px, 94vw);
  max-height: 90vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: 18px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.5);
  padding: 6px 4px 4px;
  animation: fade-up 0.5s ease both;
}
/* ── Compactado de los elementos dentro de la tarjeta flotante ── */
.landing-card .landing-inst { align-self: center; padding: 16px 22px 6px; gap: 11px; }
.landing-card .inst-logo { height: 34px; }
.landing-card .inst-names strong { font-size: 12px; }
.landing-card .inst-names span { font-size: 9.5px; }
.landing-card .landing-hero { padding: 0 22px; max-width: 100%; margin: 2px 0 0; }
.landing-card #hero-frame { width: min(210px, 62%); margin-bottom: 4px; }   /* logo PORTICO prominente */
.landing-card .hero-title { font-size: clamp(40px, 9vw, 56px); }
.landing-card .hero-tag { margin-top: 6px; font-size: 13px; }
.landing-card .hero-desc { display: none; }      /* descripción larga: fuera para mantenerla pequeña */
.landing-card .hero-chips { display: none; }       /* chips: fuera por espacio */
/* Acciones apiladas: las dos primarias a lo ancho de la tarjeta */
.landing-card .hero-actions { margin-top: 16px; gap: 9px; flex-direction: column; width: 100%; }
.landing-card #btn-enter, .landing-card #btn-asistente { width: 100%; font-size: 14px; padding: 13px 22px; border-radius: 12px; }
.landing-card #btn-install, .landing-card #btn-manual { font-size: 13px; padding: 11px 18px; border-radius: 12px; }
.landing-card .hero-kbd { margin-top: 9px; }
.landing-card .landing-credit { padding: 14px 22px 18px; font-size: 11px; line-height: 1.6; max-width: 100%; }
.landing-card .landing-logos { gap: 18px; margin-bottom: 10px; }
.landing-card .landing-logos img { height: 34px; }
/* La portada sigue el tema de la app. En OSCURO se redeclaran las variables
   (el :root base ya es oscuro, pero esto la deja explícita para el splash);
   en CLARO hereda las variables de :root[data-theme="light"]. */
:root[data-theme="dark"] #landing {
  --bg: #070a0f; --bg2: #0c1117; --bg3: #121925; --bg4: #1b2433;
  --border: #1d2735; --border2: #2d3a4d;
  --text: #dbe4ee; --text-muted: #7e8da0;
  --accent: #38bdf8; --teal: #2dd4bf;
}
/* Modo claro: el título y los chips estaban pensados para fondo oscuro. */
:root[data-theme="light"] .hero-title {
  background: linear-gradient(115deg, #16344a 22%, var(--accent) 68%, var(--teal));
  -webkit-background-clip: text; background-clip: text;
}
:root[data-theme="light"] .hero-chips span { background: rgba(255, 255, 255, 0.72); }
/* Modo claro: la etiqueta del asistente en negro (no gris claro) y placeholder legible. */
:root[data-theme="light"] .hero-assistant-label { color: var(--text) !important; font-weight: 600; }
:root[data-theme="light"] #landing-nl::placeholder { color: #74839a; opacity: 1; }
:root[data-theme="light"] #landing::before {
  background-image:
    linear-gradient(rgba(40, 70, 110, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(40, 70, 110, 0.06) 1px, transparent 1px),
    linear-gradient(rgba(40, 70, 110, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(40, 70, 110, 0.03) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
}
#landing.exit { opacity: 0; filter: blur(6px); pointer-events: none; }

/* trama de plano técnico (oculta en modo ventana flotante) */
#landing::before {
  content: none;
  position: absolute;
  inset: -120px;
  background-image:
    linear-gradient(rgba(125, 150, 180, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125, 150, 180, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(125, 150, 180, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125, 150, 180, 0.025) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
  animation: grid-drift 60s linear infinite;
  pointer-events: none;
}
@keyframes grid-drift {
  from { transform: translate(0, 0); }
  to   { transform: translate(120px, 120px); }
}

/* ── encabezado institucional ── */
.landing-inst {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 26px 34px;
  align-self: flex-start;
  animation: fade-down 0.9s ease both;
  z-index: 1;
}
.inst-mark { width: 44px; height: 44px; flex-shrink: 0; }
.inst-logo { height: 46px; width: auto; flex-shrink: 0; display: block; }
.inst-names { display: flex; flex-direction: column; gap: 2px; }
.inst-names strong {
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
}
.inst-names span {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* ── héroe central ── */
.landing-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  z-index: 1;
  padding: 0 24px;
  max-width: 760px;
  width: 100%;
  box-sizing: border-box;
  margin: auto 0;          /* centra si hay espacio; permite scroll si no */
}
#hero-frame {
  width: min(330px, 60vw);
  height: auto;
  margin-bottom: 6px;
  animation: fade-up 1s 0.15s ease both;
}
#hero-frame .frame-line {
  fill: none;
  stroke: var(--border2);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
#hero-frame .frame-deformed {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 820;
  stroke-dashoffset: 820;
  animation: draw-path 2.2s 0.6s cubic-bezier(0.6, 0, 0.2, 1) forwards;
  filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.45));
}
#hero-frame .frame-node { fill: var(--teal); }
#hero-frame .frame-support { fill: none; stroke: var(--text-muted); stroke-width: 2.5; }
@keyframes draw-path { to { stroke-dashoffset: 0; } }

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(54px, 9vw, 96px);
  font-weight: 900;
  letter-spacing: 0.16em;
  margin-right: -0.16em; /* compensa tracking del último carácter */
  line-height: 1;
  background: linear-gradient(115deg, #eaf3fb 30%, var(--accent) 70%, var(--teal));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: fade-up 1s 0.3s ease both;
}
.hero-tag {
  margin-top: 14px;
  font-size: clamp(15px, 2.3vw, 19px);
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.01em;
  animation: fade-up 1s 0.45s ease both;
}
.hero-desc {
  margin-top: 12px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-muted);
  max-width: 560px;
  animation: fade-up 1s 0.55s ease both;
}
.hero-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 22px;
  animation: fade-up 1s 0.65s ease both;
}
.hero-chips span {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border: 1px solid var(--border2);
  border-radius: 99px;
  padding: 5px 13px;
  background: rgba(18, 25, 37, 0.6);
  backdrop-filter: blur(6px);
  transition: color 0.2s, border-color 0.2s, transform 0.2s;
}
.hero-chips span:hover {
  color: var(--accent);
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  animation: fade-up 1s 0.75s ease both;
}

#btn-enter, #btn-asistente {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: #04222e;
  background: linear-gradient(120deg, var(--accent), var(--teal));
  border: none;
  border-radius: 14px;
  padding: 15px 34px;
  cursor: pointer;
  box-shadow: 0 8px 30px rgba(56, 189, 248, 0.30);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  animation: fade-up 1s 0.75s ease both;
}
#btn-enter:hover, #btn-asistente:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 14px 42px rgba(56, 189, 248, 0.45);
}
#btn-enter:active, #btn-asistente:active { transform: translateY(0) scale(0.99); }
#btn-enter .arrow, #btn-asistente .arrow { transition: transform 0.18s ease; }
#btn-enter:hover .arrow, #btn-asistente:hover .arrow { transform: translateX(4px); }

/* Botón secundario "Instalar app" (PWA) */
#btn-install, #btn-manual {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--accent);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid var(--accent-dim);
  border-radius: 14px;
  padding: 14px 26px;
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}
#btn-install:hover, #btn-manual:hover {
  background: rgba(56, 189, 248, 0.16);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(56, 189, 248, 0.22);
}
#btn-install:active, #btn-manual:active { transform: translateY(0); }
/* Pulso sutil cuando el navegador confirma que es instalable */
#btn-install.ready { animation: install-pulse 2.4s ease-in-out infinite; }
@keyframes install-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.0); }
  50%      { box-shadow: 0 0 0 6px rgba(56, 189, 248, 0.10); }
}

.install-hint {
  margin: 14px auto 0;
  max-width: 460px;
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--text-muted);
  background: rgba(56, 189, 248, 0.06);
  border: 1px solid rgba(56, 189, 248, 0.18);
  border-radius: 8px;
  padding: 9px 13px;
}
.install-hint b { color: var(--accent); font-weight: 600; }

.hero-kbd {
  margin-top: 14px;
  font-size: 11px;
  color: var(--text-muted);
  animation: fade-up 1s 0.85s ease both;
}
.hero-kbd kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 2px 7px;
  color: var(--text);
}

/* ── crédito al pie ── */
.landing-credit {
  z-index: 1;
  padding: 24px 34px 28px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-muted);
  text-align: center;
  max-width: 720px;
  animation: fade-up 1s 0.9s ease both;
}
.landing-credit strong { color: var(--text); font-weight: 600; }

/* ── banda de logos institucionales ── */
.landing-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 26px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.landing-logos img { height: 44px; width: auto; }
/* Logos solo-color (texto oscuro) van sobre chip blanco para que se lean en oscuro */
.logo-chip {
  background: #fff;
  padding: 7px 12px;
  border-radius: 8px;
  box-sizing: content-box;
}

/* Logos en la sección Acerca de (Ayuda) */
.help-logos {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
  margin: 14px 0 4px;
}
.help-logos img { height: 38px; width: auto; }
.help-logos .logo-chip { height: 30px; }

@keyframes fade-up {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fade-down {
  from { opacity: 0; transform: translateY(-14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── pantallas de poca altura (notebooks 720–800px) ── */
@media (max-height: 800px) {
  .landing-inst { padding: 16px 26px; }
  .inst-mark { width: 36px; height: 36px; }
  .inst-logo { height: 36px; }
  .landing-logos { gap: 18px; margin-bottom: 10px; }
  .landing-logos img { height: 34px; }
  #hero-frame { width: min(190px, 40vw); margin-bottom: 2px; }
  .hero-title { font-size: clamp(44px, 6.5vw, 64px); }
  .hero-tag  { margin-top: 8px; font-size: 15px; }
  .hero-desc { margin-top: 8px; font-size: 12.5px; max-width: 520px; }
  .hero-chips { margin-top: 14px; }
  #btn-enter { margin-top: 20px; padding: 12px 28px; font-size: 14px; }
  .hero-kbd  { margin-top: 9px; }
  .landing-credit { padding: 12px 26px 16px; font-size: 11px; }
}

/* Pantallas BAJAS: en lugar de ocultar el logo, la tarjeta se APAISA →
   dos columnas (logo a la izquierda, título + acciones a la derecha) para
   reducir la altura sin perder el pórtico. */
@media (max-height: 620px) {
  .landing-card { width: min(780px, 96vw); max-height: 96vh; }
  .landing-card .landing-inst { padding: 12px 22px 2px; }
  .landing-card .landing-hero {
    display: grid;
    grid-template-columns: minmax(150px, 40%) 1fr;
    grid-template-areas:
      "logo title"
      "logo tag"
      "logo actions"
      "logo kbd";
    align-items: center;
    column-gap: 24px;
    text-align: left;
  }
  .landing-card #hero-frame { display: block; grid-area: logo; align-self: center; width: min(220px, 96%); margin: 0 auto; }
  .landing-card .hero-title { grid-area: title; text-align: left; }
  .landing-card .hero-tag { grid-area: tag; text-align: left; }
  .landing-card .hero-actions { grid-area: actions; align-items: stretch; margin-top: 8px; }
  .landing-card .hero-kbd { grid-area: kbd; text-align: left; }
  .landing-card #install-hint { grid-column: 1 / -1; }
  .landing-card .landing-credit { padding: 8px 22px 14px; }
}

/* ── Pantallas angostas (móvil): portada responsive ── */
@media (max-width: 560px) {
  .landing-inst { padding: 14px 16px; flex-wrap: wrap; gap: 8px; }
  .landing-hero { padding: 12px 16px; }
  #hero-frame { width: min(220px, 56vw); }
  .hero-title { font-size: clamp(38px, 13vw, 52px); }
  .hero-desc { display: none; }
  .hero-chips { gap: 6px; }
  .hero-chips span { font-size: 11px; padding: 4px 9px; }
  .hero-assistant { max-width: 100% !important; }
  .hero-actions { flex-wrap: wrap; justify-content: center; gap: 8px; }
  .hero-actions button { flex: 1 1 auto; min-width: 0; }
  .landing-credit { padding: 12px 16px 18px; font-size: 10.5px; }
  .landing-logos { flex-wrap: wrap; gap: 14px; }
  .landing-logos img { height: 30px; }
}

@media (prefers-reduced-motion: reduce) {
  #landing *, #landing::before { animation: none !important; }
  #hero-frame .frame-deformed { stroke-dashoffset: 0; }
}

/* ══════════════════════════════════════════════════════════════
   Panel de propiedades — liberaciones y selector de caso de carga
   ══════════════════════════════════════════════════════════════ */
.rel-hint {
  font-size: 10.5px;
  line-height: 1.55;
  color: var(--text-muted);
  background: rgba(56, 189, 248, 0.06);
  border: 1px solid rgba(56, 189, 248, 0.18);
  border-radius: 6px;
  padding: 6px 9px;
  margin: 4px 0 8px;
}
.rel-hint b { color: var(--accent); font-weight: 600; }

.rel-warn {
  font-size: 10px;
  line-height: 1.5;
  color: var(--warn);
  opacity: 0.85;
  margin: 6px 0 0;
}

.releases-half-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.rel-presets { display: inline-flex; gap: 4px; }
.rel-btn {
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  background: var(--bg4);
  border: 1px solid var(--border2);
  border-radius: 5px;
  padding: 2px 8px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.rel-btn:hover { color: var(--accent); border-color: var(--accent-dim); background: var(--accent-soft); }
.rel-btn[data-rel-clear]:hover { color: var(--danger); border-color: var(--danger); background: rgba(248, 113, 113, 0.08); }

.load-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.lc-inline-select {
  flex: 1;
  min-width: 0;
  background: var(--bg4);
  border: 1px solid var(--accent-dim);
  color: var(--accent);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 5px;
  cursor: pointer;
}
.lc-inline-select:focus { outline: none; border-color: var(--accent); }

/* Botón de reacciones activo */
#btn-show-reactions.active {
  background: rgba(251, 191, 36, 0.18) !important;
  box-shadow: 0 0 10px rgba(251, 191, 36, 0.25);
}

/* Badge de modo del proyecto (2D/3D) */
#mode-badge.badge-2d {
  color: var(--warn) !important;
}
#elev-select {
  background: var(--bg4);
  border: 1px solid var(--border2);
  color: var(--text);
  font-size: 11px;
  padding: 2px 5px;
  border-radius: 5px;
  cursor: pointer;
}

/* ══════════════════════════════════════════════════════════════
   Visor de matrices (didáctico)
   ══════════════════════════════════════════════════════════════ */
#modal-box.modal-wide {
  width: min(94vw, 1040px);
  max-width: min(94vw, 1040px);
}
#modal-box.modal-wide #modal-body {
  max-height: min(72vh, 640px);
  overflow-y: auto;
}

.mtx-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  margin: 12px 0 4px;
  letter-spacing: 0.02em;
}
.mtx-wrap {
  overflow: auto;
  max-height: 300px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
}
table.mtx {
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 10px;
  white-space: nowrap;
}
table.mtx th {
  position: sticky;
  background: var(--bg3);
  color: var(--teal);
  font-weight: 600;
  padding: 3px 7px;
  border: 1px solid var(--border);
  z-index: 1;
}
table.mtx tr th:first-child { left: 0; z-index: 2; }
table.mtx tr:first-child th { top: 0; }
table.mtx td {
  padding: 3px 7px;
  border: 1px solid var(--border);
  color: var(--text);
  text-align: right;
}
table.mtx td.mz { color: var(--border2); }   /* ceros atenuados — se ve la estructura de la matriz */

/* ══════════════════════════════════════════════════════════════
   DCL — diagrama de cuerpo libre
   ══════════════════════════════════════════════════════════════ */
.dcl-svg {
  width: 100%;
  max-width: 660px;
  display: block;
  margin: 4px auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.dcl-svg .dcl-title { fill: var(--text); font-size: 13px; font-weight: 700; }
.dcl-svg .dcl-beam  { fill: var(--bg4); stroke: var(--border2); }
.dcl-svg .dcl-node  { fill: var(--teal); }
.dcl-svg .dcl-end   { fill: var(--text-muted); font-size: 12px; text-anchor: middle; }
.dcl-svg .dcl-len   { fill: var(--text-muted); font-size: 11px; text-anchor: middle; }
.dcl-svg .dcl-val   { font-size: 11px; font-weight: 700; text-anchor: middle; font-family: var(--font-mono); }

table.dcl-eq {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
table.dcl-eq th, table.dcl-eq td {
  padding: 5px 10px;
  border: 1px solid var(--border);
}
table.dcl-eq th { background: var(--bg3); color: var(--text-muted); text-align: left; }

/* ══════════════════════════════════════════════════════════════
   AYUDA (F1)
   ══════════════════════════════════════════════════════════════ */
#help-overlay {
  position: fixed;
  inset: 0;
  z-index: 9500;   /* por encima de la portada (#landing = 9000): manual sobre la portada */
  background: rgba(4, 6, 10, 0.72);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
}
#help-overlay.hidden { display: none; }

#help-box {
  width: min(960px, 96vw);
  height: min(720px, 92vh);
  display: flex;
  flex-direction: column;
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

#help-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 18px;
  background: var(--bg3);
  border-bottom: 1px solid var(--border2);
  flex-shrink: 0;
}
.help-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--accent);
  white-space: nowrap;
}
#help-nav { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.help-tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 13px;
  border-radius: 8px;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}
.help-tab:hover { color: var(--text); background: var(--bg4); }
.help-tab.active { color: var(--accent); background: var(--accent-soft); border-color: var(--accent-dim); }
#help-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 17px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
}
#help-close:hover { color: var(--danger); background: var(--bg4); }

#help-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px 26px 30px;
}
.help-sec { display: none; }
.help-sec.active { display: block; }

.help-sec h2 {
  font-size: 14px;
  color: var(--accent);
  margin: 18px 0 8px;
  letter-spacing: 0.02em;
}
.help-sec h2:first-child { margin-top: 0; }
.help-sec p, .help-sec li { font-size: 12.5px; line-height: 1.65; color: var(--text); }
.help-sec code, .help-sec pre {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--teal);
}
.help-sec pre { display: block; padding: 10px 14px; overflow-x: auto; margin: 8px 0; line-height: 1.5; }

.help-steps { padding-left: 22px; }
.help-steps li { margin-bottom: 7px; }

.help-list { padding-left: 20px; }
.help-list li { margin-bottom: 5px; }

.help-kbd { border-collapse: collapse; width: 100%; }
.help-kbd td { padding: 5px 10px; border: 1px solid var(--border); font-size: 12px; }
.help-kbd td:first-child { white-space: nowrap; width: 1%; }
.help-kbd kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 2px 6px;
  color: var(--text);
}

.help-note {
  font-size: 11.5px;
  color: var(--text-muted);
  background: rgba(56, 189, 248, 0.06);
  border: 1px solid rgba(56, 189, 248, 0.18);
  border-radius: 8px;
  padding: 9px 13px;
  margin-top: 12px;
}

.help-axes { display: flex; gap: 14px; flex-wrap: wrap; margin: 10px 0; }
.help-axcard {
  flex: 1;
  min-width: 280px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
}
.help-axcard svg { width: 100%; height: auto; }
.help-axcard p { font-size: 11.5px; color: var(--text-muted); margin: 6px 2px 0; }

.help-prof { margin-top: 16px; }
.help-prof summary {
  cursor: pointer;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--warn);
  padding: 8px 0;
}

.help-excard {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 15px;
  margin-bottom: 10px;
}
.help-extitle { font-size: 13px; font-weight: 700; color: var(--text); }
.help-exdesc  { font-size: 12px; color: var(--text-muted); margin-top: 3px; line-height: 1.5; }
.help-exobs   { font-size: 11.5px; color: var(--teal); margin-top: 5px; }
.help-excard .help-exopen { width: auto; margin-top: 8px; padding: 5px 16px; }

/* ── Documentation viewer (Help → Documentación) ─────────────────────────────── */
#hsec-docs .hidden { display: none; }
.doc-group { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin: 18px 0 8px; }
.doc-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; }
.doc-card {
  display: flex; flex-direction: column; gap: 4px; text-align: left;
  background: var(--bg); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 14px; cursor: pointer; transition: border-color 0.15s, background 0.15s;
}
.doc-card:hover { border-color: var(--accent-dim); background: var(--bg4); }
.doc-card-t { font-size: 12.5px; font-weight: 700; color: var(--text); }
.doc-card-d { font-size: 11.5px; color: var(--text-muted); line-height: 1.45; }
.doc-back {
  background: var(--bg3); border: 1px solid var(--border2); color: var(--text);
  font-size: 12px; font-weight: 600; padding: 6px 14px; border-radius: 8px;
  cursor: pointer; margin-bottom: 14px;
}
.doc-back:hover { color: var(--accent); border-color: var(--accent-dim); }

/* Rendered Markdown */
.doc-body { font-size: 13px; line-height: 1.7; color: var(--text); max-width: 780px; }
.doc-body h1 { font-size: 20px; color: var(--text); margin: 0 0 4px; letter-spacing: 0.01em; }
.doc-body h2 { font-size: 16px; color: var(--accent); margin: 22px 0 8px; }
.doc-body h3 { font-size: 14px; color: var(--text); margin: 18px 0 6px; }
.doc-body h4 { font-size: 12.5px; color: var(--text-muted); margin: 14px 0 6px; text-transform: uppercase; letter-spacing: 0.05em; }
.doc-body p { margin: 9px 0; }
.doc-body ul, .doc-body ol { padding-left: 22px; margin: 9px 0; }
.doc-body li { margin-bottom: 5px; }
.doc-body a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--accent-dim); }
.doc-body a:hover { border-bottom-style: solid; filter: brightness(1.15); }
.doc-body img { max-width: 100%; height: auto; display: block; margin: 12px auto; background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 6px; }
.doc-body code {
  font-family: var(--font-mono); font-size: 11.5px; background: var(--bg);
  border: 1px solid var(--border); border-radius: 4px; padding: 1px 5px; color: var(--teal);
}
.doc-body pre {
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 15px; overflow-x: auto; margin: 12px 0; line-height: 1.55;
}
.doc-body pre code { border: none; background: none; padding: 0; color: var(--text); font-size: 11.5px; white-space: pre; }
.doc-body blockquote {
  margin: 12px 0; padding: 2px 14px; border-left: 3px solid var(--accent-dim);
  background: rgba(56, 189, 248, 0.05); color: var(--text-muted); border-radius: 0 8px 8px 0;
}
.doc-body table { border-collapse: collapse; width: 100%; margin: 12px 0; font-size: 12px; display: block; overflow-x: auto; }
.doc-body th, .doc-body td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
.doc-body th { background: var(--bg3); color: var(--text); font-weight: 700; }
.doc-body hr { border: none; border-top: 1px solid var(--border2); margin: 20px 0; }
.doc-body sub, .doc-body sup { color: var(--text-muted); font-size: 10.5px; }

.help-about-hero {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 14px;
}