:root {
  --fondo: #0f0e1a;
  --superficie: #1a1830;
  --superficie-2: #221f40;
  --superficie-hover: #272358;
  --borde: #332f5a;
  --texto: #ece9ff;
  --texto-tenue: #8a84b8;
  --acento: #c6f24e;
  --acento-osc: #9bc02f;
  --acento-glow: rgba(198,242,78,.22);
  --info: #5ad1e6;
  --info-glow: rgba(90,209,230,.15);
  --ok: #50fa7b;
  --error: #ff5555;
  --ouro: #f5c842;
  --prata: #a8bac8;
  --bronze: #cd8b5a;
  --magenta: #ff79c6;
  --radio: 12px;
  --sombra: 0 12px 36px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(ellipse 120% 60% at 75% -5%, #1e1a40 0%, transparent 60%),
    radial-gradient(ellipse 80% 40% at 10% 80%, #12102a 0%, transparent 55%),
    var(--fondo);
  background-image:
    radial-gradient(rgba(100,90,170,.18) 1px, transparent 1px),
    radial-gradient(ellipse 120% 60% at 75% -5%, #1e1a40 0%, transparent 60%),
    radial-gradient(ellipse 80% 40% at 10% 80%, #12102a 0%, transparent 55%);
  background-size: 28px 28px, 100% 100%, 100% 100%;
  color: var(--texto);
  font-family: "Sora", system-ui, sans-serif;
  min-height: 100vh;
  padding-bottom: 30px;
}

.mono { font-family: "JetBrains Mono", ui-monospace, monospace; }

/* ---- barra superior ---- */
.barra {
  position: relative;
  display: flex; align-items: center; gap: 16px;
  padding: 14px 24px; border-bottom: 1px solid var(--borde);
  flex-wrap: wrap;
  background: rgba(15,14,26,.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.barra::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--acento) 0%, var(--info) 45%, var(--magenta) 100%);
}

.marca {
  font-weight: 800; font-size: 1.25rem; letter-spacing: -.02em;
  color: var(--texto); text-decoration: none;
  display: flex; align-items: center; gap: 7px;
}
.marca-prompt {
  font-family: "JetBrains Mono", monospace;
  font-weight: 400; font-size: .85em;
  color: var(--acento); opacity: .85;
}
.marca span { color: var(--acento); }

.lema { color: var(--texto-tenue); font-size: .82rem; }
.nav-principal { margin-left: auto; display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.nav-principal a {
  position: relative;
  color: var(--texto-tenue); text-decoration: none; font-size: .85rem;
  padding-bottom: 2px;
  transition: color .15s;
}
.nav-principal a::after {
  content: '';
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 1px; background: var(--acento);
  transform: scaleX(0); transform-origin: left;
  transition: transform .2s ease;
}
.nav-principal a:hover { color: var(--texto); }
.nav-principal a:hover::after { transform: scaleX(1); }

.contenido { max-width: 880px; margin: 0 auto; padding: 36px 20px 70px; }

/* ---- hero / inicio ---- */
.titulo-hero {
  font-size: clamp(2rem, 5.5vw, 3.4rem);
  font-weight: 800; line-height: 1.04;
  letter-spacing: -.03em; margin: 8px 0 14px;
}
.resaltado { color: var(--acento); }
.bajada { color: var(--texto-tenue); max-width: 54ch; line-height: 1.65; }

.tarjeta {
  background: var(--superficie); border: 1px solid var(--borde);
  border-radius: var(--radio); box-shadow: var(--sombra); padding: 24px;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.tarjeta:hover {
  border-color: rgba(198,242,78,.28);
  box-shadow: 0 0 0 1px rgba(198,242,78,.08), var(--sombra);
}
.union { display: grid; gap: 8px; max-width: 380px; margin: 28px 0 18px; }
.union label { font-size: .8rem; color: var(--texto-tenue); margin-top: 6px; }
.titulo-tarjeta { font-size: 1.05rem; margin: 0 0 10px; font-weight: 700; }
.grid-dos {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px; align-items: start;
}
.panel-info { padding: 24px 0; display: flex; flex-direction: column; gap: 14px; align-items: flex-start; }
.checkline { display: flex; gap: 10px; align-items: flex-start; line-height: 1.45; color: var(--texto-tenue); }
.checkline input { margin-top: 3px; accent-color: var(--acento); }
.checkline a { color: var(--info); }

.campo {
  width: 100%; padding: 12px 14px; border-radius: 9px;
  border: 1px solid var(--borde); background: var(--superficie-2);
  color: var(--texto); font-size: 1rem; outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.campo:focus {
  border-color: var(--acento);
  box-shadow: 0 0 0 3px var(--acento-glow);
}
#pin { font-size: 1.6rem; letter-spacing: .35em; text-align: center; }

.boton {
  display: inline-flex; align-items: center; gap: 6px;
  cursor: pointer; border: none; border-radius: 9px;
  padding: 12px 18px; font-family: inherit; font-size: .95rem; font-weight: 600;
  text-decoration: none; text-align: center;
  transition: transform .06s ease, filter .15s ease, box-shadow .15s ease;
}
.boton:active { transform: translateY(1px); }
.boton:disabled { cursor: not-allowed; opacity: .5; transform: none; filter: none; }

.primario {
  background: var(--acento); color: #0f0e1a;
  box-shadow: 0 4px 18px var(--acento-glow);
}
.primario:hover {
  filter: brightness(1.07);
  box-shadow: 0 4px 28px rgba(198,242,78,.45);
}
.secundario {
  background: var(--superficie-2); color: var(--texto);
  border: 1px solid var(--borde);
}
.secundario:hover { border-color: var(--texto-tenue); }
.fantasma {
  background: transparent; color: var(--texto-tenue);
  border: 1px solid var(--borde); padding: 8px 12px; font-size: .84rem;
}
.fantasma:hover { color: var(--texto); border-color: var(--texto-tenue); }
.enlace-docente { display: inline-block; margin-top: 10px; color: var(--info); text-decoration: none; }
.enlace-docente:hover { text-decoration: underline; }

/* Keyboard shortcut badge */
.kbd {
  display: inline-block;
  font-family: "JetBrains Mono", monospace;
  font-size: .68rem; font-weight: 400;
  padding: 1px 5px;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 4px;
  color: rgba(255,255,255,.45);
  vertical-align: middle;
  line-height: 1.5;
  letter-spacing: 0;
}
.primario .kbd { border-color: rgba(15,14,26,.25); color: rgba(15,14,26,.45); }

.error { color: var(--error); min-height: 1.2em; margin: 6px 0 0; font-size: .9rem; }
.ok { color: var(--ok); }
.err { color: var(--error); }
.hint { color: var(--texto-tenue); font-size: .85rem; }
.oculto, .oculto.activa { display: none !important; }

/* ---- docente ---- */
.titulo-seccion { font-size: 1.55rem; font-weight: 800; letter-spacing: -.02em; margin: 0 0 6px; }
.titulo-seccion .mono { color: var(--texto-tenue); font-size: 1rem; }
.lista-desafios { display: grid; gap: 8px; margin-top: 4px; max-width: 540px; max-height: 48vh; overflow-y: auto; padding-right: 4px; }
.filtros-lista { display: flex; flex-direction: column; gap: 8px; margin: 14px 0 6px; max-width: 540px; }
.campo-buscar { padding: 9px 12px; font-size: .9rem; }
.chips-filtro { display: flex; gap: 6px; flex-wrap: wrap; }
.chip-filtro {
  border: 1px solid var(--borde); background: var(--superficie);
  color: var(--texto-tenue); border-radius: 999px; padding: 5px 12px;
  cursor: pointer; font-family: inherit; font-size: .78rem;
  transition: color .15s, border-color .15s, background .15s;
}
.chip-filtro:hover:not(.activo) { color: var(--texto); border-color: rgba(198,242,78,.35); }
.chip-filtro.activo { color: #0f0e1a; background: var(--acento); border-color: var(--acento); }
.item-desafio {
  display: flex; align-items: center; gap: 12px;
  padding: 13px 16px;
  background: var(--superficie); border: 1px solid var(--borde);
  border-radius: 9px; cursor: pointer;
  transition: background .15s, border-color .15s;
}
.item-desafio:hover {
  background: var(--superficie-hover);
  border-color: rgba(198,242,78,.28);
}
.item-desafio .nombre { flex: 1; font-weight: 600; }
.item-desafio .meta { color: var(--texto-tenue); font-size: .84rem; }
.item-desafio input { width: 18px; height: 18px; accent-color: var(--acento); }
.chip {
  display: inline-block;
  background: var(--info-glow);
  border: 1px solid var(--info); color: var(--info);
  border-radius: 999px; padding: 2px 8px; font-size: .72rem;
}
.chip.tenue {
  background: rgba(138,132,184,.1);
  border-color: var(--borde); color: var(--texto-tenue);
}
.tabs { display: flex; gap: 8px; margin: 22px 0 14px; flex-wrap: wrap; }
.tab {
  border: 1px solid var(--borde); background: var(--superficie);
  color: var(--texto-tenue); border-radius: 999px; padding: 7px 16px;
  cursor: pointer; font-family: inherit; font-size: .85rem;
  transition: color .15s, border-color .15s;
}
.tab:hover:not(.activa) { color: var(--texto); border-color: rgba(198,242,78,.35); }
.tab.activa { color: #0f0e1a; background: var(--acento); border-color: var(--acento); }
.tab-panel { display: none; }
.tab-panel.activo { display: block; }
.form-grid { display: grid; grid-template-columns: 1fr 180px; gap: 12px; max-width: 780px; }
.form-grid label { display: grid; gap: 6px; color: var(--texto-tenue); font-size: .84rem; }
.span-2 { grid-column: 1 / -1; }
.area { min-height: 120px; resize: vertical; line-height: 1.5; }
.area.corta { min-height: 70px; }
.area.codigo { min-height: 150px; font-family: "JetBrains Mono", monospace; font-size: .88rem; }
.biblioteca { display: grid; gap: 10px; }
.item-biblioteca {
  display: flex; justify-content: space-between; gap: 16px;
  padding: 14px 16px; background: var(--superficie);
  border: 1px solid var(--borde); border-radius: 9px;
  transition: border-color .15s;
}
.item-biblioteca:hover { border-color: rgba(198,242,78,.25); }
.item-biblioteca h3 { margin: 0 0 5px; font-size: 1rem; }
.item-biblioteca p { margin: 0; color: var(--texto-tenue); line-height: 1.5; }
.paquetes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px; margin: 12px 0 20px;
}
.paquete-card {
  display: flex; flex-direction: column; justify-content: space-between; gap: 14px;
  background: var(--superficie); border: 1px solid var(--borde);
  border-radius: 9px; padding: 16px;
  transition: border-color .2s, box-shadow .2s;
}
.paquete-card:hover {
  border-color: rgba(198,242,78,.3);
  box-shadow: 0 0 0 1px rgba(198,242,78,.07), var(--sombra);
}
.paquete-card h3 { margin: 0 0 5px; font-size: 1rem; }
.paquete-card p { margin: 0 0 8px; color: var(--texto-tenue); line-height: 1.5; }

.pin-creado { margin-top: 26px; display: grid; gap: 12px; max-width: 380px; text-align: center; }
.etq { color: var(--texto-tenue); font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; margin: 0; }
.pin-grande {
  font-size: 2.6rem; font-weight: 700; letter-spacing: .2em; margin: 0;
  color: var(--acento);
  text-shadow: 0 0 24px var(--acento-glow);
}

/* ---- host ---- */
.cabecera-host { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; }
.estado-host { text-align: right; }
.estado-chip {
  display: inline-block;
  background: var(--superficie-2); border: 1px solid var(--borde);
  border-radius: 999px; padding: 5px 14px; font-size: .84rem;
  color: var(--info); margin: 0;
}
.acciones-host { display: flex; align-items: center; gap: 12px; margin: 24px 0; flex-wrap: wrap; }
#contador-host { font-size: 1.4rem; color: var(--acento); margin: 6px 0 0; }

.metricas-host {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px; margin: 18px 0 24px;
}
.metricas-host div {
  background: var(--superficie); border: 1px solid var(--borde);
  border-radius: 9px; padding: 14px;
  transition: border-color .15s, transform .15s;
}
.metricas-host div:hover {
  border-color: rgba(198,242,78,.3);
  transform: translateY(-2px);
}
.metricas-host span { display: block; color: var(--acento); font-size: 1.45rem; font-weight: 700; }
.metricas-host small { color: var(--texto-tenue); }
.tabla-simple { display: grid; gap: 8px; margin-top: 12px; }
.fila-tabla {
  display: grid; grid-template-columns: 1fr auto auto auto;
  gap: 12px; align-items: center; padding: 10px 12px;
  border: 1px solid var(--borde); border-radius: 8px;
  background: var(--superficie); color: var(--texto-tenue);
}
.fila-tabla span:first-child { color: var(--texto); }
.fila-tabla a { color: var(--info); }
.legal { line-height: 1.7; }
.legal h2 { margin: 24px 0 6px; font-size: 1.05rem; }
.legal p { color: var(--texto-tenue); }

/* ---- leaderboard con medallas ---- */
.leaderboard { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 8px; }
.leaderboard li {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 16px; background: var(--superficie);
  border: 1px solid var(--borde); border-radius: 9px;
  transition: border-color .15s;
}
.leaderboard .pos {
  font-family: "JetBrains Mono", monospace;
  color: var(--texto-tenue); width: 1.8em; font-size: .9rem;
}
.leaderboard .jug { flex: 1; font-weight: 600; }
.leaderboard .pts { font-family: "JetBrains Mono", monospace; color: var(--acento); }

/* Medallas */
.leaderboard li:nth-child(1) {
  border-color: var(--ouro);
  background: linear-gradient(135deg, var(--superficie), rgba(245,200,66,.06));
}
.leaderboard li:nth-child(1) .pos {
  color: var(--ouro);
  text-shadow: 0 0 10px rgba(245,200,66,.55);
}
.leaderboard li:nth-child(1) .pts { color: var(--ouro); }

.leaderboard li:nth-child(2) { border-color: var(--prata); }
.leaderboard li:nth-child(2) .pos { color: var(--prata); }

.leaderboard li:nth-child(3) { border-color: var(--bronze); }
.leaderboard li:nth-child(3) .pos { color: var(--bronze); }

/* ---- juego (estudiante) ---- */
.pantalla { display: none; }
.pantalla.activa { display: block; }
.centro { text-align: center; padding: 52px 0; }
.pulso {
  width: 56px; height: 56px; margin: 0 auto 20px;
  border-radius: 50%; background: var(--acento);
  animation: latido-glow 1.5s ease-in-out infinite;
}
@keyframes latido-glow {
  0%   { transform: scale(.85); opacity: .55; box-shadow: 0 0 0 0 var(--acento-glow); }
  50%  { transform: scale(1);   opacity: 1;   box-shadow: 0 0 0 18px rgba(198,242,78,0); }
  100% { transform: scale(.85); opacity: .55; box-shadow: 0 0 0 0 var(--acento-glow); }
}

.barra-juego { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.indice { color: var(--texto-tenue); font-size: .95rem; }
.timer {
  margin-left: auto; font-size: 1.9rem; font-weight: 700;
  color: var(--acento); min-width: 2.5ch; text-align: right;
  text-shadow: 0 0 16px var(--acento-glow);
}
.timer.alerta {
  color: var(--error);
  text-shadow: 0 0 16px rgba(255,85,85,.4);
  animation: parpadeo .65s steps(2) infinite;
}
@keyframes parpadeo { 50% { opacity: .3; } }

.titulo-reto { font-size: 1.4rem; font-weight: 800; margin: 6px 0; }
.enunciado { color: var(--texto); line-height: 1.6; margin: 0 0 12px; }
.pista {
  background: rgba(90,209,230,.08); border-left: 3px solid var(--info);
  padding: 10px 14px; border-radius: 0 8px 8px 0;
  color: var(--info); margin: 0 0 14px;
}

/* ---- CodeMirror theming ---- */
.CodeMirror {
  height: 240px; border: 1px solid var(--borde); border-radius: 9px;
  font-family: "JetBrains Mono", monospace; font-size: 13.5px;
  background: #0d1117 !important;
}
.CodeMirror-gutters {
  background: #0d1117 !important;
  border-right: 1px solid var(--borde) !important;
}

.botones-reto {
  display: flex; align-items: center; gap: 10px;
  margin: 14px 0; flex-wrap: wrap;
}
.botones-reto .hint { margin-left: auto; }

/* Estado Pyodide con indicador animado */
#estado-pyodide {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--texto-tenue); font-size: .84rem;
}
#estado-pyodide::before {
  content: '';
  display: inline-block; width: 7px; height: 7px;
  border-radius: 50%; background: var(--texto-tenue);
  animation: dot-pulse 1.4s ease-in-out infinite;
}
#estado-pyodide.listo { color: var(--ok); }
#estado-pyodide.listo::before { background: var(--ok); animation: none; }
@keyframes dot-pulse {
  0%,100% { opacity: .3; transform: scale(.75); }
  50%     { opacity: 1;   transform: scale(1.15); }
}

.detalle-tests {
  background: var(--superficie); border: 1px solid var(--borde);
  border-radius: 9px; padding: 12px 14px; margin: 0 0 14px; font-size: .9rem;
}
.detalle-tests p { margin: 0 0 8px; }
.detalle-tests ul { margin: 0; padding-left: 20px; color: var(--texto-tenue); line-height: 1.55; }
.detalle-tests .ok { color: var(--ok); }
.detalle-tests .err { color: var(--error); }

/* Salida / consola estilo terminal */
.salida { background: #0a090f; border: 1px solid var(--borde); border-radius: 9px; overflow: hidden; }
.salida-cab {
  display: flex; justify-content: space-between;
  padding: 8px 14px; border-bottom: 1px solid var(--borde);
  font-size: .8rem; color: var(--texto-tenue);
  background: #0d0c18;
}
.salida-cab::before {
  content: '● ● ●';
  letter-spacing: 4px; font-size: .6rem;
  color: var(--borde);
}
.consola {
  margin: 0; padding: 12px 14px;
  font-family: "JetBrains Mono", monospace; font-size: 12.5px;
  line-height: 1.55; white-space: pre-wrap; word-break: break-word;
  min-height: 48px; max-height: 260px; overflow: auto;
  color: #f8f8f2;
}
.consola .ok  { color: var(--ok); }
.consola .err { color: var(--error); }

.bloqueado { opacity: .5; pointer-events: none; }

/* ---- notebook (Jupyter-style) ---- */
.notebook { display: flex; flex-direction: column; gap: 10px; margin: 14px 0 0; }

.celda {
  background: var(--superficie); border: 1px solid var(--borde);
  border-radius: 9px; overflow: hidden;
  transition: border-color .15s;
}
.celda:focus-within { border-color: rgba(198,242,78,.4); }

.celda-cab {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 10px; background: #0d0c18;
  border-bottom: 1px solid var(--borde);
}
.celda-etiqueta {
  font-size: .76rem; color: var(--texto-tenue);
  min-width: 3.2ch; flex-shrink: 0;
  font-family: "JetBrains Mono", monospace;
}
.celda-acciones { display: flex; gap: 6px; margin-left: auto; }

.boton-celda {
  background: transparent; border: 1px solid var(--borde); border-radius: 5px;
  color: var(--texto-tenue); padding: 3px 10px; font-size: .78rem;
  font-family: inherit; cursor: pointer; line-height: 1.4;
  transition: color .1s, border-color .1s;
}
.boton-celda:hover            { color: var(--texto); border-color: var(--texto-tenue); }
.boton-celda.btn-run:hover    { color: var(--ok);    border-color: var(--ok); }
.boton-celda.btn-eliminar:hover { color: var(--error); border-color: var(--error); }
.boton-celda:focus-visible    { outline: 2px solid var(--acento); outline-offset: 2px; }
.boton-celda:disabled         { cursor: not-allowed; opacity: .4; }

.celda-editor .CodeMirror { height: auto; min-height: 60px; border: none; border-radius: 0; }
.celda-editor .CodeMirror-scroll { min-height: 60px; }

.celda-salida {
  padding: 10px 14px; border-top: 1px solid var(--borde);
  background: #0a090f;
  font-family: "JetBrains Mono", monospace;
  font-size: 12.5px; line-height: 1.55;
  max-height: 240px; overflow-y: auto;
}
.celda-salida pre   { margin: 0; white-space: pre-wrap; word-break: break-word; color: #f8f8f2; }
.celda-salida .valor { color: var(--info); }
.celda-salida .err  { color: var(--error); }
.celda-salida .corriendo { color: var(--texto-tenue); font-style: italic; }
.estado-solucion {
  margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--borde);
  font-weight: 700;
}

.nb-controles { display: flex; align-items: center; gap: 10px; margin: 10px 0 4px; flex-wrap: wrap; }
.nb-controles .boton { padding: 7px 14px; font-size: .86rem; }

/* ---- hero code window ---- */
.hero-code {
  background: #0a090f; border: 1px solid var(--borde);
  border-radius: var(--radio); overflow: hidden;
  font-family: "JetBrains Mono", monospace; font-size: 12.5px;
  line-height: 1.65; box-shadow: var(--sombra);
  width: 100%;
}
.hero-code-bar {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 14px; background: #0d0c18;
  border-bottom: 1px solid var(--borde);
}
.hero-code-dot { width: 11px; height: 11px; border-radius: 50%; flex-shrink: 0; }
.hero-code-dot.rojo   { background: #ff5f57; }
.hero-code-dot.amarillo { background: #ffbd2e; }
.hero-code-dot.verde  { background: #28c840; }
.hero-code-filename {
  font-size: .75rem; color: var(--texto-tenue); margin-left: 4px;
}
.hero-code-body {
  margin: 0; padding: 14px 16px;
  white-space: pre; overflow-x: auto;
  color: #f8f8f2;
}
.hero-code-body .kw       { color: var(--magenta); }
.hero-code-body .fn       { color: var(--info); }
.hero-code-body .lit      { color: var(--ouro); }
.hero-code-body .str      { color: #f1fa8c; }
.hero-code-body .comment  { color: #6272a4; }
.hero-code-body .num      { color: #bd93f9; }
.hero-code-body .ok-line  { color: var(--ok); }
.hero-code-body .err-line { color: var(--error); }

/* ---- barra de estado inferior (IDE-style) ---- */
.status-bar {
  position: fixed; bottom: 0; left: 0; right: 0;
  height: 26px; z-index: 200;
  background: var(--acento); color: #0f0e1a;
  font-family: "JetBrains Mono", monospace;
  font-size: .7rem; font-weight: 600;
  display: flex; align-items: center;
  padding: 0 14px; gap: 18px;
  user-select: none;
}
.status-bar .sep { opacity: .3; }
.status-right { margin-left: auto; display: flex; gap: 16px; }
.status-bar span { opacity: .75; }
.status-bar strong { opacity: 1; }

/* ---- scrollbar personalizado ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--borde); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--texto-tenue); }

/* ---- responsive ---- */
@media (max-width: 640px) {
  .contenido { padding: 20px 14px 60px; }
  .timer { font-size: 1.55rem; }
  .grid-dos, .form-grid { grid-template-columns: 1fr; }
  .nav-principal { width: 100%; margin-left: 0; }
  .fila-tabla { grid-template-columns: 1fr auto; }
  .celda-etiqueta { font-size: .7rem; }
  .boton-celda { padding: 2px 8px; font-size: .74rem; }
  .status-bar { font-size: .65rem; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .pulso, .timer.alerta, #estado-pyodide::before { animation: none; }
}