:root {
  --fondo: #f3f4f1;
  --superficie: #ffffff;
  --borde: #d9ddd5;
  --texto: #18201b;
  --texto-suave: #5b665e;
  --acento: #1f5f3a;
  --acento-texto: #ffffff;
  --ok: #1d7a43;
  --medio: #a86400;
  --mal: #b3261e;
  --radio: 14px;
  --sombra: 0 1px 2px rgba(0, 0, 0, .06);
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--fondo);
  color: var(--texto);
  font-size: 16px;
  line-height: 1.4;
  padding-bottom: calc(68px + env(safe-area-inset-bottom));
  -webkit-tap-highlight-color: transparent;
}
[hidden] { display: none !important; }
h2 { font-size: 1.05rem; margin: 0 0 .5rem; }
h2 em, .campo em { font-style: normal; font-weight: 400; color: var(--texto-suave); font-size: .85em; }

/* ---------- barra superior ---------- */
.barra {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: .5rem;
  padding: calc(.6rem + env(safe-area-inset-top)) 1rem .6rem;
  background: var(--fondo);
  border-bottom: 1px solid var(--borde);
}
.barra-titulo { display: flex; flex-direction: column; min-width: 0; }
.barra-titulo strong { font-size: 1.1rem; }
.sub { color: var(--texto-suave); font-size: .85rem; display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chips { display: flex; gap: .4rem; flex-shrink: 0; }

.chip {
  display: inline-flex; align-items: center;
  padding: .25rem .6rem; border-radius: 999px;
  font-size: .8rem; font-weight: 600;
  background: var(--superficie); border: 1px solid var(--borde); color: var(--texto-suave);
  white-space: nowrap;
}
.chip-ok { color: var(--ok); border-color: currentColor; }
.chip-medio { color: var(--medio); border-color: currentColor; }
.chip-mal { color: var(--mal); border-color: currentColor; }
.chip-oscuro { background: rgba(0, 0, 0, .55); border-color: transparent; color: #fff; }
.chip-oscuro.chip-ok { color: #6ff0a0; }
.chip-oscuro.chip-mal { color: #ff8a80; }
.chip-boton { font: inherit; font-size: .8rem; font-weight: 600; cursor: pointer; }

main { max-width: 640px; margin: 0 auto; padding: .75rem 1rem 1rem; }

/* ---------- cámara ---------- */
.camara {
  position: relative;
  background: #0d120f;
  border-radius: var(--radio);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  max-height: 58vh;
  width: 100%;
  margin: 0 auto .75rem;
}
#lienzo { display: none; width: 100%; height: 100%; object-fit: contain; }
#lienzo.visible { display: block; }
#video { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }

.camara-apagada {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .75rem;
  padding: 1.5rem; text-align: center; color: #e6ece8;
}
.camara-apagada p { margin: 0 0 .25rem; }
.camara-apagada .error { color: #ffb4ab; font-size: .9rem; }

.hud {
  position: absolute; left: 0; right: 0; bottom: 0;
  display: flex; align-items: flex-end; justify-content: space-between; gap: .5rem;
  padding: 2.5rem .9rem .8rem;
  background: linear-gradient(transparent, rgba(0, 0, 0, .75));
  color: #fff;
}
.hud-lectura { display: flex; flex-direction: column; }
.hud-etiqueta { font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; opacity: .85; }
.hud-valor { font-size: 2.6rem; font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; }
.hud-valor small { font-size: 1rem; font-weight: 600; opacity: .85; }
.hud-estado { display: flex; flex-direction: column; align-items: flex-end; gap: .4rem; }

/* ---------- botones ---------- */
.btn {
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  min-height: 48px; padding: .7rem 1.1rem;
  border-radius: 12px; border: 1px solid var(--borde);
  font: inherit; font-weight: 700;
  background: var(--superficie); color: var(--texto);
  cursor: pointer; user-select: none;
}
.btn:disabled { opacity: .45; cursor: default; }
.btn-primario { background: var(--acento); border-color: var(--acento); color: var(--acento-texto); }
.btn-secundario { background: var(--superficie); }
.btn-peligro { color: var(--mal); border-color: currentColor; background: var(--superficie); }
.btn-chico { min-height: 40px; padding: .5rem .9rem; font-size: .9rem; }
.btn-medir {
  width: 100%; min-height: 72px; font-size: 1.4rem; letter-spacing: .02em;
  background: var(--acento); border-color: var(--acento); color: var(--acento-texto);
  border-radius: 18px;
}
.btn > span:not(.progreso) { position: relative; z-index: 1; }
.progreso {
  position: absolute; left: 0; top: 0; bottom: 0; width: 0;
  background: rgba(255, 255, 255, .25);
  transition: width .15s linear;
}
.btn-secundario .progreso { background: rgba(31, 95, 58, .15); }
.link { background: none; border: 0; padding: 0; font: inherit; color: var(--acento); font-weight: 700; text-decoration: underline; cursor: pointer; }

.btn-x {
  min-width: 40px; min-height: 40px; border-radius: 10px;
  border: 1px solid var(--borde); background: var(--superficie);
  font-size: 1.2rem; line-height: 1; color: var(--texto-suave); cursor: pointer;
}
.btn-x-confirmar { color: var(--mal); border-color: currentColor; font-size: .8rem; font-weight: 700; padding: 0 .5rem; }

/* ---------- tarjetas y formularios ---------- */
.tarjeta {
  background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio);
  box-shadow: var(--sombra); padding: 1rem; margin-top: .75rem;
}
.tab > .tarjeta:first-child { margin-top: 0; }
#tab-medir .tarjeta { margin-top: .75rem; }
.ayuda { color: var(--texto-suave); font-size: .92rem; margin: 0 0 .75rem; }
.aviso {
  background: #fff6e5; border: 1px solid #f0d7a8; color: #6b4300;
  border-radius: 12px; padding: .7rem .9rem; margin-bottom: .75rem; font-size: .95rem;
}
.fila { display: flex; gap: .6rem; align-items: flex-end; flex-wrap: wrap; }
.fila > * { flex: 1 1 140px; }
.campo { display: flex; flex-direction: column; gap: .3rem; margin-bottom: .75rem; font-size: .9rem; font-weight: 600; }
.fila .campo { margin-bottom: 0; }
.campo input, .campo select {
  min-height: 48px; padding: .6rem .75rem;
  border: 1px solid var(--borde); border-radius: 12px;
  font: inherit; font-size: 1rem; font-weight: 400; color: var(--texto); background: #fff;
  width: 100%;
}
.campo input:focus, .campo select:focus { outline: 2px solid var(--acento); outline-offset: 1px; }

.tabla { width: 100%; border-collapse: collapse; margin-top: 1rem; font-variant-numeric: tabular-nums; }
.tabla th { text-align: left; font-size: .75rem; letter-spacing: .06em; text-transform: uppercase; color: var(--texto-suave); padding: .4rem .3rem; border-bottom: 1px solid var(--borde); }
.tabla td { padding: .45rem .3rem; border-bottom: 1px solid var(--borde); }
.tabla td:last-child { text-align: right; width: 48px; }
.tabla .vacio { color: var(--texto-suave); text-align: left; }
td.ok, .resumen.ok { color: var(--ok); }
td.medio, .resumen.medio { color: var(--medio); }
td.mal, .resumen.mal { color: var(--mal); }
.resumen { font-size: .92rem; margin: .75rem 0; font-weight: 600; }

.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: .6rem; margin: .75rem 0; }
.kpis > div { border: 1px solid var(--borde); border-radius: 12px; padding: .55rem .7rem; }
.kpis span { display: block; font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; color: var(--texto-suave); }
.kpis strong { font-size: 1.3rem; font-variant-numeric: tabular-nums; }
.ultima-cabecera { display: flex; align-items: baseline; justify-content: space-between; gap: .5rem; }
.ultima-cabecera h2 { margin: 0; }
#ultima p { margin: .25rem 0; white-space: normal; }

.lista { list-style: none; margin: .75rem 0 0; padding: 0; display: flex; flex-direction: column; gap: .5rem; }
.lista li {
  display: flex; align-items: center; justify-content: space-between; gap: .75rem;
  background: var(--superficie); border: 1px solid var(--borde); border-radius: 12px; padding: .65rem .8rem;
}
.lista li > div { min-width: 0; }
.lista li .sub { white-space: normal; }
.lista .vacio { color: var(--texto-suave); justify-content: center; border-style: dashed; }

/* ---------- pestañas ---------- */
.tabs {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 10;
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: var(--superficie); border-top: 1px solid var(--borde);
  padding-bottom: env(safe-area-inset-bottom);
}
.tabs button {
  min-height: 60px; border: 0; background: none;
  font: inherit; font-size: .9rem; font-weight: 600; color: var(--texto-suave); cursor: pointer;
  border-top: 3px solid transparent;
}
.tabs button.activa { color: var(--acento); border-top-color: var(--acento); }

/* ---------- toast ---------- */
.toast {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: calc(76px + env(safe-area-inset-bottom)); z-index: 20;
  max-width: calc(100% - 32px); padding: .7rem 1rem; border-radius: 12px;
  background: #18201b; color: #fff; font-weight: 600; font-size: .95rem;
  box-shadow: 0 6px 20px rgba(0, 0, 0, .25);
}
.toast-mal { background: var(--mal); }
.toast-medio { background: var(--medio); }

@media (min-width: 700px) {
  .camara { max-height: 62vh; }
}