/* ════════════════════════════════════════════════════════════
   Polcito Lab — Estética de laboratorio moderno
   Tema oscuro, cristal, neones de seguridad química
   ════════════════════════════════════════════════════════════ */

:root {
  --bg0: #060a13;
  --bg1: #0b1220;
  --panel: linear-gradient(160deg, rgba(30, 41, 59, 0.55), rgba(12, 18, 32, 0.72));
  --stroke: rgba(148, 163, 184, 0.14);
  --stroke-hi: rgba(148, 163, 184, 0.3);
  --text: #e6edf7;
  --muted: #8ea0b8;
  --acc: #22d3ee;
  --acc-soft: rgba(34, 211, 238, 0.16);
  --acc2: #a3e635;
  --violet: #a78bfa;
  --danger: #fb7185;
  --radius: 20px;
  --font-head: 'Baloo 2', system-ui, sans-serif;
  --font-body: 'Nunito', system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body { height: 100%; overflow: hidden; }

body {
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(1000px 600px at 15% -10%, rgba(34, 211, 238, 0.10), transparent 60%),
    radial-gradient(900px 700px at 95% 110%, rgba(167, 139, 250, 0.10), transparent 60%),
    radial-gradient(700px 500px at 80% -10%, rgba(163, 230, 53, 0.06), transparent 60%),
    var(--bg0);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

/* patrón de puntos tipo rejilla de laboratorio */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: radial-gradient(rgba(148, 163, 184, 0.09) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
  z-index: 0;
}

.glass {
  background: var(--panel);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.38), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* ══════════ LAYOUT ══════════ */
.app {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 310px 1fr 300px;
  grid-template-rows: 68px 1fr;
  grid-template-areas:
    'top top top'
    'left stage right';
  gap: 14px;
  height: 100dvh;
  padding: 14px;
}

.topbar { grid-area: top; }
.panel-left { grid-area: left; }
.stage { grid-area: stage; }
.panel-right { grid-area: right; }

/* ══════════ BARRA SUPERIOR ══════════ */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-logo {
  font-size: 30px;
  filter: drop-shadow(0 0 12px rgba(34, 211, 238, 0.5));
  animation: bob 3.5s ease-in-out infinite;
}
@keyframes bob {
  0%, 100% { transform: translateY(0) rotate(-4deg); }
  50% { transform: translateY(-4px) rotate(4deg); }
}

.brand-text h1 {
  font-family: var(--font-head);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.4px;
  line-height: 1;
}
.brand-text h1 .grad {
  background: linear-gradient(90deg, var(--acc), var(--acc2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand-text p {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--muted);
}

.top-actions { display: flex; align-items: center; gap: 8px; }

.px-counter {
  font-size: 12px;
  font-weight: 800;
  color: var(--muted);
  background: rgba(2, 6, 17, 0.5);
  border: 1px solid var(--stroke);
  padding: 6px 12px;
  border-radius: 999px;
  margin-right: 6px;
  font-variant-numeric: tabular-nums;
}

/* Volver al portal y saber quién soy.
   Sólo aparecen cuando el laboratorio se abre dentro de Polcito; abierto con
   doble clic no hay portal al que volver ni cuenta con la que entrar. */
.lab-home,
.lab-user {
  padding: 6px 13px;
  border: 1px solid var(--stroke);
  border-radius: 999px;
  background: rgba(2, 6, 17, 0.5);
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.lab-home { margin-left: 6px; }
.lab-user { margin-right: 6px; }

.lab-home:hover,
.lab-user[href]:hover {
  border-color: var(--acc);
  color: var(--acc);
}

.lab-user.dentro { color: var(--acc); }

.icon-btn {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  font-size: 18px;
  background: rgba(148, 163, 184, 0.08);
  border: 1px solid var(--stroke);
  border-radius: 14px;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.15s, box-shadow 0.15s, border-color 0.15s;
}
.icon-btn:hover {
  background: var(--acc-soft);
  border-color: rgba(34, 211, 238, 0.45);
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.25);
  transform: translateY(-2px);
}
.icon-btn:active { transform: translateY(0) scale(0.94); }
.icon-btn.accent { border-color: rgba(34, 211, 238, 0.5); background: var(--acc-soft); }
.icon-btn.toggled { background: rgba(163, 230, 53, 0.18); border-color: rgba(163, 230, 53, 0.5); }

/* ══════════ PANELES LATERALES ══════════ */
.panel-left, .panel-right {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 16px 10px;
}
.panel-head h2, .retos h2 {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
}
.retos h2 { padding: 0 16px; }

.mini-btn {
  display: none;
  width: 28px; height: 28px;
  border-radius: 9px;
  border: 1px solid var(--stroke);
  background: rgba(148, 163, 184, 0.1);
  color: var(--text);
  cursor: pointer;
  font-size: 12px;
}

.panel-tip {
  padding: 10px 16px 14px;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px dashed var(--stroke);
}

/* pestañas de categorías — se envuelven, nada se corta */
.cat-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 12px 12px;
}

.cat-tab {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 7px 10px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 800;
  color: var(--muted);
  background: rgba(148, 163, 184, 0.07);
  border: 1px solid var(--stroke);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.cat-tab:hover { color: var(--text); border-color: var(--stroke-hi); }
.cat-tab.active {
  color: #06222a;
  background: linear-gradient(120deg, var(--acc), #67e8f9);
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(34, 211, 238, 0.35);
}

/* rejilla de elementos */
.el-grid {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  padding: 2px 14px 12px;
  align-content: start;
}

.el-btn {
  --el: #888;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 8px;
  background: rgba(2, 6, 17, 0.35);
  border: 1px solid var(--stroke);
  border-radius: 14px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.12s ease, border-color 0.15s, box-shadow 0.15s, background 0.15s;
  text-align: left;
  min-width: 0;
  overflow: hidden;
}
.el-btn > span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  flex: 1;
}
.el-btn .dot {
  width: 12px; height: 12px;
  flex: 0 0 12px;
  border-radius: 5px;
  background: var(--el);
  box-shadow: 0 0 10px var(--el);
}
.el-btn .em { font-size: 15px; flex: 0 0 auto; }
.el-btn:hover {
  transform: translateY(-2px);
  border-color: var(--el);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
}
.el-btn.active {
  background: rgba(34, 211, 238, 0.1);
  border-color: var(--acc);
  box-shadow: 0 0 0 1px var(--acc), 0 6px 20px rgba(34, 211, 238, 0.25);
}

/* ══════════ ESCENARIO / CÁMARA ══════════ */
.stage {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  min-height: 0;
}

.stage-wrap {
  position: relative;
  flex: 1;
  min-height: 0;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(34, 211, 238, 0.22);
  box-shadow:
    0 0 0 1px rgba(2, 6, 17, 0.8),
    0 0 44px rgba(34, 211, 238, 0.09),
    inset 0 0 60px rgba(2, 6, 17, 0.7);
  background: #0b101c;
}

#lab-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
  cursor: none;
  touch-action: none;
}

.grid-overlay {
  position: absolute; inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mix-blend-mode: screen;
}

.stage-badge {
  position: absolute;
  top: 12px; left: 14px;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 3px;
  color: rgba(34, 211, 238, 0.65);
  pointer-events: none;
}

.brush-cursor {
  position: absolute;
  border: 2px solid rgba(255, 255, 255, 0.85);
  border-radius: 50%;
  box-shadow: 0 0 0 2px rgba(34, 211, 238, 0.5), 0 0 18px rgba(34, 211, 238, 0.35);
  transform: translate(-50%, -50%);
  pointer-events: none;
  display: none;
  z-index: 3;
}

/* dock de herramientas */
.dock {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 16px;
  flex-wrap: wrap;
}

.tool-group { display: flex; gap: 8px; flex-wrap: wrap; }

.tool-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 14px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 800;
  color: var(--muted);
  background: rgba(148, 163, 184, 0.07);
  border: 1px solid var(--stroke);
  border-radius: 14px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.tool-btn span { pointer-events: none; }
.tool-btn:hover { color: var(--text); transform: translateY(-2px); }
.tool-btn.active {
  color: #06222a;
  background: linear-gradient(120deg, var(--acc), #67e8f9);
  border-color: transparent;
  box-shadow: 0 4px 18px rgba(34, 211, 238, 0.4);
}

.brush-group { display: flex; align-items: center; gap: 10px; }
.brush-label { font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); }
.brush-val {
  min-width: 34px;
  text-align: center;
  font-weight: 800;
  background: rgba(2, 6, 17, 0.5);
  border: 1px solid var(--stroke);
  border-radius: 9px;
  padding: 4px 6px;
  font-variant-numeric: tabular-nums;
}

input[type='range'] {
  -webkit-appearance: none;
  appearance: none;
  width: 150px;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--acc) var(--fill, 20%), rgba(148, 163, 184, 0.2) var(--fill, 20%));
  outline: none;
  cursor: pointer;
}
input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--acc);
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.6);
  cursor: grab;
}
input[type='range']::-moz-range-thumb {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--acc);
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.6);
  cursor: grab;
}

/* ══════════ FICHA CIENTÍFICA ══════════ */
.panel-right { overflow-y: auto; }

.ins-card {
  margin: 0 14px 14px;
  padding: 16px;
  border-radius: 16px;
  background: rgba(2, 6, 17, 0.4);
  border: 1px solid var(--stroke);
}

.ins-hero { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }

.ins-emoji {
  font-size: 34px;
  width: 58px; height: 58px;
  display: grid; place-items: center;
  border-radius: 16px;
  background: var(--acc-soft);
  border: 1px solid rgba(34, 211, 238, 0.3);
}

.ins-hero h3 { font-family: var(--font-head); font-size: 20px; }

.ins-cat {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--acc);
  background: var(--acc-soft);
  border-radius: 999px;
  padding: 3px 10px;
  margin-top: 3px;
}

.ins-desc {
  font-size: 13.5px;
  line-height: 1.55;
  color: #c8d4e6;
  margin-bottom: 12px;
}

.ins-card.identify {
  border-color: var(--acc);
  box-shadow: 0 0 0 1px var(--acc), 0 0 24px rgba(34, 211, 238, 0.3);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.ins-props { display: flex; flex-wrap: wrap; gap: 6px; }

.prop-chip {
  font-size: 11px;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.1);
  border: 1px solid var(--stroke);
  color: var(--muted);
}
.prop-chip.on { color: var(--acc2); border-color: rgba(163, 230, 53, 0.4); background: rgba(163, 230, 53, 0.08); }

/* retos / misiones */
.retos { padding-bottom: 16px; }
.retos-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
}
.retos-head h2 { flex: 1; font-family: var(--font-head); font-size: 17px; font-weight: 700; }

.mode-switch { display: flex; gap: 4px; }
.mode-btn {
  width: 30px; height: 30px;
  display: grid; place-items: center;
  font-size: 15px;
  background: rgba(148, 163, 184, 0.08);
  border: 1px solid var(--stroke);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.15s ease;
  opacity: 0.55;
}
.mode-btn:hover { opacity: 1; }
.mode-btn.active {
  opacity: 1;
  background: var(--acc-soft);
  border-color: rgba(34, 211, 238, 0.5);
  box-shadow: 0 0 10px rgba(34, 211, 238, 0.25);
}

.pts-chip {
  font-size: 13px;
  font-weight: 800;
  color: #fde68a;
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid rgba(251, 191, 36, 0.4);
  border-radius: 999px;
  padding: 4px 11px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.retos-list { list-style: none; padding: 10px 14px 0; display: flex; flex-direction: column; gap: 8px; }

.reto .pts {
  flex: 0 0 auto;
  align-self: center;
  font-size: 10.5px;
  font-weight: 800;
  color: #fde68a;
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid rgba(251, 191, 36, 0.35);
  border-radius: 999px;
  padding: 2px 8px;
  white-space: nowrap;
}

.retos-done-btn {
  margin: 10px 14px 0;
  width: calc(100% - 28px);
  padding: 8px 10px;
  font-size: 12px;
  font-weight: 800;
  text-align: left;
  color: var(--muted);
  background: rgba(148, 163, 184, 0.06);
  border: 1px solid var(--stroke);
  border-radius: 11px;
  cursor: pointer;
}
.retos-done-btn:hover { color: var(--text); }
.retos-done-list { list-style: none; padding: 8px 14px 0; display: flex; flex-direction: column; gap: 8px; }

/* toast especial para anuncios de reacción */
.toast.react {
  border-color: rgba(167, 139, 250, 0.55);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 22px rgba(167, 139, 250, 0.3);
  background: linear-gradient(160deg, rgba(46, 32, 80, 0.92), rgba(18, 14, 36, 0.95));
}

.reto {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 11px 12px;
  border-radius: 14px;
  background: rgba(2, 6, 17, 0.35);
  border: 1px solid var(--stroke);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  font-size: 12.5px;
  line-height: 1.4;
}
.reto:hover { border-color: var(--stroke-hi); }
.reto .check {
  flex: 0 0 auto;
  width: 20px; height: 20px;
  margin-top: 1px;
  border-radius: 7px;
  border: 2px solid var(--muted);
  display: grid; place-items: center;
  font-size: 12px;
  color: transparent;
  transition: all 0.18s ease;
}
.reto.done { background: rgba(163, 230, 53, 0.07); border-color: rgba(163, 230, 53, 0.35); }
.reto.done .check { background: var(--acc2); border-color: var(--acc2); color: #1a2e05; }
.reto.done .reto-text { color: var(--muted); text-decoration: line-through; }
.reto b { color: var(--text); }

/* ══════════ FABs ══════════ */
.fab {
  position: fixed;
  bottom: 20px;
  z-index: 40;
  width: 56px; height: 56px;
  display: none;
  place-items: center;
  font-size: 24px;
  border-radius: 18px;
  border: 1px solid rgba(34, 211, 238, 0.4);
  background: linear-gradient(160deg, rgba(30, 41, 59, 0.9), rgba(12, 18, 32, 0.95));
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5), 0 0 20px rgba(34, 211, 238, 0.25);
  cursor: pointer;
}
.fab-left { left: 20px; }
.fab-right { right: 20px; }

/* ══════════ MODAL ══════════ */
.modal-backdrop {
  position: fixed; inset: 0;
  z-index: 60;
  display: grid; place-items: center;
  background: rgba(2, 6, 17, 0.7);
  backdrop-filter: blur(6px);
  animation: fadeIn 0.2s ease;
  padding: 20px;
}
.modal-backdrop[hidden] { display: none; }

.modal {
  max-width: 560px;
  width: 100%;
  max-height: 85dvh;
  overflow-y: auto;
  padding: 26px;
  animation: pop 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.modal h2 { font-family: var(--font-head); margin-bottom: 14px; }

.help-grid { display: grid; gap: 12px; margin-bottom: 20px; }
.help-grid p { font-size: 13px; color: var(--muted); margin-top: 2px; }

.btn-primary {
  width: 100%;
  padding: 13px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  color: #06222a;
  background: linear-gradient(120deg, var(--acc), var(--acc2));
  border: none;
  border-radius: 14px;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.15s;
  box-shadow: 0 6px 20px rgba(34, 211, 238, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(34, 211, 238, 0.5); }
.btn-primary:active { transform: scale(0.97); }

@keyframes fadeIn { from { opacity: 0; } }
@keyframes pop { from { transform: scale(0.9) translateY(14px); opacity: 0; } }

/* ══════════ MODAL DE ESCENARIOS ══════════ */
.save-row {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}
.save-row input {
  flex: 1;
  padding: 11px 14px;
  font-family: var(--font-body);
  font-size: 13.5px;
  color: var(--text);
  background: rgba(2, 6, 17, 0.5);
  border: 1px solid var(--stroke);
  border-radius: 12px;
  outline: none;
}
.save-row input:focus { border-color: var(--acc); }
.save-row input::placeholder { color: var(--muted); }

.btn-mini {
  padding: 10px 16px;
  font-family: var(--font-head);
  font-size: 13.5px;
  font-weight: 700;
  color: #06222a;
  background: linear-gradient(120deg, var(--acc), var(--acc2));
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.12s ease;
  white-space: nowrap;
}
.btn-mini:hover { transform: translateY(-1px); }

.saves-list { list-style: none; display: flex; flex-direction: column; gap: 8px; max-height: 40dvh; overflow-y: auto; margin-bottom: 14px; }

.save-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(2, 6, 17, 0.4);
  border: 1px solid var(--stroke);
}
.save-item .name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 700; font-size: 13px; }
.save-item .date { font-size: 11px; color: var(--muted); flex: 0 0 auto; }

.save-btn {
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 800;
  color: var(--text);
  background: rgba(148, 163, 184, 0.1);
  border: 1px solid var(--stroke);
  border-radius: 9px;
  cursor: pointer;
  transition: background 0.15s;
}
.save-btn:hover { background: rgba(148, 163, 184, 0.2); }
.save-btn.danger { color: var(--danger); }
.save-btn.danger:hover { background: rgba(251, 113, 133, 0.15); }

.save-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.ghost-btn {
  flex: 1;
  padding: 10px;
  font-size: 12.5px;
  font-weight: 800;
  color: var(--acc);
  background: transparent;
  border: 1px dashed rgba(34, 211, 238, 0.45);
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.15s;
}
.ghost-btn:hover { background: rgba(34, 211, 238, 0.08); }

.saves-empty { color: var(--muted); font-size: 13px; text-align: center; padding: 18px 0; }

.modal-sub { font-size: 13px; color: var(--muted); margin-bottom: 10px; }

#proponer-text {
  width: 100%;
  padding: 12px 14px;
  margin-bottom: 12px;
  font-family: var(--font-body);
  font-size: 13.5px;
  color: var(--text);
  background: rgba(2, 6, 17, 0.5);
  border: 1px solid var(--stroke);
  border-radius: 12px;
  outline: none;
  resize: vertical;
}
#proponer-text:focus { border-color: var(--acc); }
#proponer-text::placeholder { color: var(--muted); }

/* ══════════ TOASTS ══════════ */
.toast-wrap {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 70;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}
.toast {
  padding: 11px 20px;
  border-radius: 999px;
  background: linear-gradient(160deg, rgba(30, 41, 59, 0.92), rgba(12, 18, 32, 0.95));
  border: 1px solid rgba(34, 211, 238, 0.4);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 20px rgba(34, 211, 238, 0.2);
  font-size: 13.5px;
  font-weight: 700;
  animation: toastIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  white-space: nowrap;
  max-width: 90vw;
  overflow: hidden;
  text-overflow: ellipsis;
}
.toast.out { animation: toastOut 0.3s ease forwards; }
@keyframes toastIn { from { transform: translateY(20px) scale(0.9); opacity: 0; } }
@keyframes toastOut { to { transform: translateY(14px); opacity: 0; } }

/* ══════════ SCROLLBARS ══════════ */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(148, 163, 184, 0.25); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: rgba(148, 163, 184, 0.45); }

/* ══════════ RESPONSIVE ══════════ */
@media (max-width: 1200px) {
  .app { grid-template-columns: 240px 1fr; grid-template-areas: 'top top' 'left stage'; }
  .panel-right {
    position: fixed;
    top: 0; right: 0; bottom: 0;
    width: min(330px, 88vw);
    z-index: 50;
    border-radius: 0;
    transform: translateX(105%);
    transition: transform 0.28s cubic-bezier(0.32, 0.72, 0, 1);
  }
  .panel-right.open { transform: translateX(0); }
  .panel-right .mini-btn { display: grid; place-items: center; }
  .fab-right { display: grid; }
}

@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; grid-template-areas: 'top' 'stage'; padding: 10px; gap: 10px; }
  .panel-left {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: min(300px, 85vw);
    z-index: 50;
    border-radius: 0;
    transform: translateX(-105%);
    transition: transform 0.28s cubic-bezier(0.32, 0.72, 0, 1);
  }
  .panel-left.open { transform: translateX(0); }
  .panel-left .mini-btn { display: grid; place-items: center; }
  .fab-left { display: grid; }
  .brand-text p { display: none; }
  .brand-text h1 { font-size: 20px; }
  .icon-btn { width: 38px; height: 38px; font-size: 16px; }
  .px-counter { display: none; }
  .lab-home { display: none; }
  .lab-user { padding: 6px 9px; font-size: 11px; max-width: 34vw; overflow: hidden; text-overflow: ellipsis; }
  .topbar { padding: 0 12px; }
  .tool-btn span { display: none; }
  .tool-btn { padding: 10px 12px; font-size: 16px; }
  input[type='range'] { width: 110px; }
}

@media (max-width: 480px) {
  .top-actions { gap: 5px; }
  .icon-btn { width: 34px; height: 34px; border-radius: 11px; }
  .dock { padding: 8px 10px; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ════════════════════════════════════════════════════════════
   IDENTIDAD POLCITO
   Una interfaz más cálida y juguetona alrededor de una cámara
   deliberadamente oscura para que las reacciones sigan brillando.
   ════════════════════════════════════════════════════════════ */

:root {
  --bg0: #071426;
  --bg1: #102949;
  --panel: linear-gradient(155deg, rgb(19 48 82 / 96%), rgb(10 30 55 / 98%));
  --stroke: rgb(108 190 222 / 28%);
  --stroke-hi: rgb(112 220 255 / 65%);
  --text: #fffaf0;
  --muted: #b8cce0;
  --acc: #47c9ef;
  --acc-soft: rgb(71 201 239 / 18%);
  --acc2: #ffd943;
  --violet: #8b6ee8;
  --danger: #ff6f61;
  --radius: 22px;
  --pol-ink: #17325b;
  --pol-blue: #47c9ef;
  --pol-blue-dark: #1a8fc5;
  --pol-cream: #fffaf0;
  --pol-paper: #fffdf8;
  --pol-yellow: #ffd943;
  --pol-coral: #ff6f61;
  --pol-green: #48bd88;
  --pol-shadow: #091a31;
}

body {
  background:
    radial-gradient(850px 520px at 4% -10%, rgb(71 201 239 / 24%), transparent 63%),
    radial-gradient(760px 540px at 103% 110%, rgb(255 217 67 / 13%), transparent 62%),
    radial-gradient(620px 380px at 78% -8%, rgb(255 111 97 / 10%), transparent 68%),
    linear-gradient(145deg, var(--bg1), var(--bg0) 58%, #06101f);
}

body::before {
  background-image:
    radial-gradient(rgb(120 209 240 / 16%) 1.25px, transparent 1.25px),
    linear-gradient(115deg, transparent 0 48%, rgb(255 217 67 / 3%) 49% 51%, transparent 52%);
  background-size: 28px 28px, 210px 210px;
}

button,
input,
textarea {
  font-family: var(--font-body);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--pol-coral);
  outline-offset: 3px;
}

.glass {
  border: 2px solid rgb(90 170 210 / 38%);
  background: var(--panel);
  box-shadow:
    5px 5px 0 rgb(5 17 34 / 78%),
    inset 0 1px 0 rgb(255 255 255 / 7%);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

/* La cabecera habla el mismo idioma que la portada de Polcito. */
.topbar {
  padding: 6px 10px 6px 8px;
  border: 3px solid var(--pol-ink);
  border-radius: 22px;
  color: var(--pol-ink);
  background: rgb(255 253 248 / 97%);
  box-shadow: 7px 7px 0 rgb(9 26 49 / 85%);
}

.brand {
  min-width: max-content;
  gap: 10px;
}

.brand-logo {
  display: block;
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
  overflow: hidden;
  border: 3px solid var(--pol-ink);
  border-radius: 15px;
  background: url('../images/polcito-cientifico.webp') 48% 24% / cover no-repeat;
  box-shadow: 3px 3px 0 var(--pol-yellow);
  font-size: 0;
  filter: none;
  animation: bob 3.5s ease-in-out infinite;
}

.brand-text h1 {
  color: var(--pol-ink);
  font-size: 25px;
  letter-spacing: -0.4px;
}

.brand-text h1 .grad {
  background: linear-gradient(90deg, var(--pol-blue-dark), var(--pol-green));
  -webkit-background-clip: text;
  background-clip: text;
}

.brand-text p {
  color: #59718d;
  letter-spacing: 1.5px;
}

.lab-home,
.lab-user,
.px-counter {
  border: 2px solid var(--pol-ink);
  color: var(--pol-ink);
  background: #eaf8fc;
  box-shadow: 2px 2px 0 rgb(23 50 91 / 18%);
}

.lab-home:hover,
.lab-user[href]:hover {
  border-color: var(--pol-ink);
  color: var(--pol-ink);
  background: var(--pol-yellow);
}

.lab-user.dentro {
  color: var(--pol-ink);
  background: #ddf6e9;
}

.icon-btn {
  border: 2px solid var(--pol-ink);
  border-radius: 13px;
  color: var(--pol-ink);
  background: white;
  box-shadow: 2px 2px 0 rgb(23 50 91 / 22%);
}

.icon-btn:hover {
  border-color: var(--pol-ink);
  background: var(--pol-yellow);
  box-shadow: 3px 3px 0 var(--pol-ink);
}

.icon-btn.accent {
  border-color: var(--pol-ink);
  background: var(--pol-coral);
}

.icon-btn.toggled {
  border-color: var(--pol-ink);
  background: #d9f4e7;
}

/* Paneles de trabajo: oscuros, pero sólidos, legibles y con acentos alegres. */
.panel-left,
.panel-right {
  border: 3px solid #244d76;
  background:
    radial-gradient(circle at 12% 0%, rgb(71 201 239 / 12%), transparent 34%),
    linear-gradient(155deg, #153456, #0b203b 72%);
  box-shadow: 6px 6px 0 var(--pol-shadow);
}

.panel-left { border-top-color: var(--pol-yellow); }
.panel-right { border-top-color: var(--pol-coral); }

.panel-head {
  padding: 15px 16px 12px;
}

.panel-head h2,
.retos-head h2 {
  color: var(--pol-cream);
  font-size: 18px;
  letter-spacing: 0.1px;
}

.mini-btn {
  border: 2px solid var(--pol-blue);
  color: var(--pol-cream);
  background: #0a1b32;
}

.panel-tip {
  margin: 0 10px 10px;
  padding: 10px 12px;
  border: 0;
  border-radius: 12px;
  color: var(--pol-ink);
  background: var(--pol-yellow);
  font-weight: 800;
}

.cat-tabs {
  gap: 7px;
}

.cat-tab {
  border: 2px solid rgb(111 177 211 / 24%);
  color: #cfdeec;
  background: #0a1d36;
}

.cat-tab:hover {
  border-color: var(--pol-blue);
  color: white;
  background: #102d4d;
}

.cat-tab.active {
  border: 2px solid var(--pol-ink);
  color: var(--pol-ink);
  background: var(--pol-yellow);
  box-shadow: 3px 3px 0 #071a30;
}

.el-grid {
  gap: 9px;
}

.el-btn {
  border: 2px solid rgb(102 164 196 / 20%);
  border-radius: 13px;
  color: #eef7fb;
  background: rgb(6 22 42 / 78%);
}

.el-btn:hover {
  border-color: var(--el);
  background: #112e4d;
  box-shadow: 3px 3px 0 rgb(4 15 29 / 78%);
}

.el-btn.active {
  border: 2px solid var(--pol-ink);
  color: var(--pol-ink);
  background: #dff7ff;
  box-shadow: 3px 3px 0 var(--pol-blue);
}

.el-btn .dot {
  border: 2px solid rgb(255 255 255 / 28%);
  box-shadow: 0 0 8px var(--el);
}

/* La cámara conserva su oscuridad y gana un marco reconocible. */
.stage-wrap {
  border: 3px solid var(--pol-blue);
  border-radius: 24px;
  background: #07111f;
  box-shadow:
    7px 7px 0 var(--pol-shadow),
    0 0 34px rgb(71 201 239 / 10%),
    inset 0 0 70px rgb(0 8 19 / 76%);
}

.grid-overlay {
  background-image:
    linear-gradient(rgb(111 184 218 / 7%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(111 184 218 / 7%) 1px, transparent 1px);
}

.stage-badge {
  top: 11px;
  left: 12px;
  padding: 7px 11px;
  border: 2px solid var(--pol-ink);
  border-radius: 999px;
  color: var(--pol-ink);
  background: var(--pol-yellow);
  box-shadow: 3px 3px 0 rgb(3 15 30 / 74%);
  letter-spacing: 1.6px;
}

.brush-cursor {
  border-color: white;
  box-shadow: 0 0 0 3px var(--pol-coral), 0 0 20px rgb(255 111 97 / 40%);
}

/* Barra inferior clara: el área de control no compite con la reacción. */
.dock {
  border: 3px solid var(--pol-ink);
  color: var(--pol-ink);
  background: rgb(255 253 248 / 98%);
  box-shadow: 6px 6px 0 var(--pol-shadow);
}

.tool-group {
  gap: 7px;
}

.tool-btn {
  border: 2px solid var(--pol-ink);
  color: var(--pol-ink);
  background: white;
  box-shadow: 2px 2px 0 rgb(23 50 91 / 17%);
}

.tool-btn:hover {
  color: var(--pol-ink);
  background: #e4f7fc;
  box-shadow: 3px 3px 0 var(--pol-blue);
}

.tool-btn.active {
  border: 2px solid var(--pol-ink);
  color: var(--pol-ink);
  background: var(--pol-yellow);
  box-shadow: 3px 3px 0 var(--pol-coral);
}

.brush-label {
  color: var(--pol-ink);
}

.brush-val {
  border: 2px solid var(--pol-ink);
  color: var(--pol-ink);
  background: white;
}

input[type='range'] {
  background: linear-gradient(90deg, var(--pol-blue-dark) var(--fill, 20%), #c8d7e3 var(--fill, 20%));
}

input[type='range']::-webkit-slider-thumb {
  border-color: var(--pol-ink);
  background: var(--pol-yellow);
  box-shadow: 2px 2px 0 var(--pol-coral);
}

input[type='range']::-moz-range-thumb {
  border-color: var(--pol-ink);
  background: var(--pol-yellow);
  box-shadow: 2px 2px 0 var(--pol-coral);
}

/* Ficha de ciencia: una tarjeta de papel dentro del laboratorio. */
.ins-card {
  border: 3px solid var(--pol-ink);
  border-radius: 18px;
  color: var(--pol-ink);
  background: var(--pol-paper);
  box-shadow: 4px 4px 0 rgb(6 22 42 / 72%);
}

.ins-emoji {
  border: 2px solid var(--pol-ink);
  background: #dff7ff;
  box-shadow: 2px 2px 0 var(--pol-yellow);
}

.ins-hero h3 {
  color: var(--pol-ink);
}

.ins-cat {
  border: 2px solid var(--pol-ink);
  color: var(--pol-ink);
  background: #dff7ff;
}

.ins-desc {
  color: #465f7a;
  font-weight: 700;
}

.prop-chip {
  border: 2px solid #b8c7d5;
  color: var(--pol-ink);
  background: white;
}

.prop-chip.on {
  border-color: var(--pol-ink);
  color: var(--pol-ink);
  background: #dcf5e7;
}

.ins-card.identify {
  border-color: var(--pol-ink);
  box-shadow: 4px 4px 0 var(--pol-yellow), 0 0 24px rgb(71 201 239 / 25%);
}

.mode-btn {
  border: 2px solid rgb(136 191 218 / 30%);
  background: #081a31;
}

.mode-btn.active {
  border-color: var(--pol-ink);
  background: var(--pol-yellow);
  box-shadow: 2px 2px 0 var(--pol-coral);
}

.pts-chip,
.reto .pts {
  border: 2px solid var(--pol-yellow);
  color: var(--pol-yellow);
  background: #07182d;
}

.reto,
.retos-done-btn {
  border: 2px solid rgb(108 184 218 / 25%);
  background: rgb(5 20 39 / 76%);
}

.reto:hover,
.retos-done-btn:hover {
  border-color: var(--pol-blue);
  background: #112f50;
}

.reto .check {
  border-color: #8ba6be;
}

.reto.done {
  border-color: var(--pol-green);
  background: rgb(72 189 136 / 12%);
}

.reto.done .check {
  border-color: var(--pol-ink);
  color: var(--pol-ink);
  background: var(--pol-yellow);
}

/* Ventanas y mensajes: papel, contorno grueso y sombras de la portada. */
.modal-backdrop {
  background: rgb(4 15 30 / 80%);
  backdrop-filter: blur(9px);
}

.modal.glass {
  max-width: 760px;
  border: 3px solid var(--pol-ink);
  color: var(--pol-ink);
  background: var(--pol-cream);
  box-shadow: 10px 10px 0 var(--pol-ink);
}

.modal h2 {
  color: var(--pol-ink);
  font-size: 28px;
  line-height: 1;
}

.help-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.help-grid > div {
  padding: 11px 12px;
  border: 2px solid #c2d3df;
  border-radius: 14px;
  background: white;
}

.help-grid > div:nth-child(4n + 1),
.help-grid > div:nth-child(4n + 4) {
  border-color: #9dddf0;
  background: #eaf9fd;
}

.help-grid b {
  color: var(--pol-ink);
}

.help-grid p,
.modal-sub,
.saves-empty {
  color: #5d7188;
}

.btn-primary,
.btn-mini {
  border: 3px solid var(--pol-ink);
  color: var(--pol-ink);
  background: var(--pol-yellow);
  box-shadow: 4px 4px 0 var(--pol-coral);
}

.btn-primary:hover,
.btn-mini:hover {
  box-shadow: 6px 6px 0 var(--pol-coral);
}

.save-row input,
#proponer-text {
  border: 2px solid #aec3d3;
  color: var(--pol-ink);
  background: white;
}

.save-row input:focus,
#proponer-text:focus {
  border-color: var(--pol-blue-dark);
}

.save-row input::placeholder,
#proponer-text::placeholder {
  color: #7f93a8;
}

.save-item {
  border: 2px solid #bed0dc;
  color: var(--pol-ink);
  background: white;
}

.save-btn,
.ghost-btn {
  border: 2px solid var(--pol-ink);
  color: var(--pol-ink);
  background: #eaf8fc;
}

.save-btn:hover,
.ghost-btn:hover {
  background: var(--pol-yellow);
}

.toast {
  border: 3px solid var(--pol-ink);
  color: var(--pol-ink);
  background: var(--pol-paper);
  box-shadow: 5px 5px 0 var(--pol-ink);
}

.toast.react {
  border-color: var(--pol-ink);
  color: var(--pol-ink);
  background: #e8f8fc;
  box-shadow: 5px 5px 0 var(--pol-coral);
}

.fab {
  border: 3px solid var(--pol-ink);
  color: var(--pol-ink);
  background: var(--pol-yellow);
  box-shadow: 5px 5px 0 var(--pol-ink);
}

::-webkit-scrollbar-thumb {
  border: 2px solid #0d2744;
  background: var(--pol-blue);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--pol-yellow);
}

@media (max-width: 1200px) {
  .panel-right {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
  }
}

@media (max-width: 860px) {
  .app {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto 1fr;
  }

  .topbar,
  .stage,
  .stage-wrap,
  .dock {
    width: 100%;
    min-width: 0;
    max-width: 100%;
  }

  .topbar {
    min-height: 106px;
    padding: 7px 9px;
    flex-direction: column;
    align-items: stretch;
    gap: 7px;
  }

  .brand {
    justify-content: center;
  }

  .brand-logo {
    width: 40px;
    height: 40px;
    flex-basis: 40px;
    border-radius: 12px;
  }

  .brand-text h1 {
    font-size: 21px;
  }

  .top-actions {
    width: 100%;
    min-width: 0;
    padding: 2px 2px 4px;
    overflow-x: auto;
    justify-content: flex-start;
    scrollbar-width: thin;
  }

  .lab-user {
    max-width: none;
    flex: 0 0 auto;
  }

  .panel-left,
  .panel-right {
    position: fixed;
    top: 0;
    bottom: 0;
    border-width: 0 3px 0 0;
    border-radius: 0 20px 20px 0;
  }

  .panel-left { left: 0; }

  .panel-right {
    right: 0;
    border-width: 0 0 0 3px;
    border-radius: 20px 0 0 20px;
  }

  .stage-badge {
    padding: 5px 8px;
    font-size: 8px;
  }
}

@media (max-width: 620px) {
  .help-grid {
    grid-template-columns: 1fr;
  }

  .modal.glass {
    padding: 20px 17px;
    border-radius: 20px;
    box-shadow: 6px 6px 0 var(--pol-ink);
  }

  .modal h2 {
    font-size: 24px;
  }
}

@media (max-width: 480px) {
  .app {
    padding: 7px;
    gap: 8px;
  }

  .topbar {
    border-radius: 18px;
  }

  .dock {
    border-radius: 18px;
  }

  .tool-group {
    width: 100%;
    gap: 4px;
    flex-wrap: nowrap;
    overflow-x: auto;
  }

  .tool-btn {
    display: grid;
    width: 42px;
    height: 42px;
    padding: 0;
    flex: 0 0 auto;
    place-items: center;
  }

  .fab {
    bottom: 146px;
    width: 50px;
    height: 50px;
    border-radius: 15px;
  }
}