/* Observatori de l'Habitatge de Castelló — CGT Castelló
   Mobile-first, identitat rojinegra sobre fons clar, dades protagonistes. */

:root {
  --roig: #e30613;
  --roig-fosc: #b00510;
  --negre: #1a1a1a;
  --gris: #555;
  --gris-clar: #e8e6e1;
  --fons: #faf9f7;
  --blanc: #fff;
  --verd: #1a7a3c;
  --taronja: #c96a00;
  --max-ample: 60rem;
  font-size: 100%;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  background: var(--fons);
  color: var(--negre);
  line-height: 1.55;
}

h1, h2, h3 { line-height: 1.15; font-weight: 800; }
h2 { font-size: 1.6rem; margin: 0 0 .5rem; }
h2::before { content: "— "; color: var(--roig); }
h3 { font-size: 1.1rem; margin: 1.5rem 0 .5rem; }
a { color: var(--roig-fosc); }
p { margin: .5rem 0 1rem; }

.contenidor { max-width: var(--max-ample); margin: 0 auto; padding: 0 1rem; }

/* ---------- capçalera / navegació ---------- */
header.principal {
  background: var(--negre);
  color: var(--blanc);
  padding: .6rem 0;
  position: sticky;
  top: 0;
  z-index: 50;
}
header.principal .contenidor {
  display: flex; align-items: center; gap: .8rem;
}
.logo-cgt {
  background: var(--roig); color: var(--blanc);
  font-weight: 800; padding: .15rem .5rem; letter-spacing: .05em;
  flex-shrink: 0; text-decoration: none;
}
nav.ancores {
  overflow-x: auto; white-space: nowrap; scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
nav.ancores::-webkit-scrollbar { display: none; }
nav.ancores a {
  color: var(--blanc); text-decoration: none; font-size: .85rem;
  margin-right: 1rem; opacity: .85;
}
nav.ancores a:hover, nav.ancores a:focus { opacity: 1; text-decoration: underline; }

/* ---------- hero ---------- */
.hero { background: var(--negre); color: var(--blanc); padding: 2.5rem 0 2rem; }
.hero h1 { font-size: clamp(1.7rem, 5vw, 2.8rem); margin: 0 0 .5rem; }
.hero h1 em { color: var(--roig); font-style: normal; }
.hero .subtitol { font-size: 1.05rem; opacity: .9; max-width: 44rem; }
.cifres {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 1rem; margin-top: 1.8rem;
}
@media (min-width: 700px) { .cifres { grid-template-columns: repeat(4, 1fr); } }
.cifra { border-top: 3px solid var(--roig); padding-top: .5rem; }
.cifra strong {
  display: block; font-size: clamp(1.6rem, 4.5vw, 2.4rem);
  font-weight: 800; color: var(--blanc);
}
.cifra span { font-size: .85rem; opacity: .85; }
.cifra .font { display: block; font-size: .7rem; opacity: .55; margin-top: .3rem; }

/* ---------- seccions ---------- */
section { padding: 2.5rem 0 1.5rem; scroll-margin-top: 4rem; }
section:nth-of-type(even) { background: var(--blanc); }
.entradeta { max-width: 44rem; color: var(--gris); }

figure.grafic { margin: 1.5rem 0; }
figure.grafic .marc {
  position: relative; height: 20rem; background: var(--blanc);
  border: 1px solid var(--gris-clar); border-radius: 4px; padding: .8rem;
}
section:nth-of-type(even) figure.grafic .marc { background: var(--fons); }
figure.grafic figcaption {
  font-size: .8rem; color: var(--gris); margin-top: .4rem;
}
button.descarrega {
  font-size: .72rem; padding: .1rem .5rem; cursor: pointer;
  border: 1px solid var(--gris); background: transparent; color: var(--gris);
  border-radius: 3px; vertical-align: 1px;
}
button.descarrega:hover { border-color: var(--roig); color: var(--roig-fosc); }

details.taula { margin-top: .4rem; font-size: .85rem; }
details.taula summary { cursor: pointer; color: var(--gris); }
details.taula table { border-collapse: collapse; margin-top: .5rem; width: 100%; }
details.taula th, details.taula td {
  border: 1px solid var(--gris-clar); padding: .25rem .5rem; text-align: right;
}
details.taula th:first-child, details.taula td:first-child { text-align: left; }

.destacat {
  border-left: 4px solid var(--roig); background: var(--blanc);
  padding: .8rem 1rem; margin: 1rem 0; max-width: 44rem;
}
section:nth-of-type(even) .destacat { background: var(--fons); }
.destacat strong { color: var(--roig-fosc); }

/* ---------- calculadora ---------- */
#calculadora { background: var(--roig); color: var(--blanc); }
#calculadora h2 { color: var(--blanc); }
#calculadora h2::before { content: "— "; color: var(--negre); }
.calc-caixa {
  background: var(--blanc); color: var(--negre); border-radius: 6px;
  padding: 1.2rem; margin-top: 1rem;
}
/* variant per a les calculadores dins de seccions clares */
.calc-caixa.suau { border: 2px solid var(--negre); margin: 2rem 0 1rem; }
.calc-caixa.suau h3 { margin-top: 0; }
.calc-caixa.suau h3::before { content: "▸ "; color: var(--roig); }
.calc-camps { display: grid; gap: 1.2rem; }
@media (min-width: 700px) { .calc-camps { grid-template-columns: 1fr 1fr 1fr; } }
.calc-camps label { font-weight: 700; font-size: .9rem; display: block; }
.calc-camps input[type="number"], .calc-camps select {
  width: 100%; padding: .5rem; font-size: 1.1rem; margin-top: .3rem;
  border: 2px solid var(--negre); border-radius: 4px; background: var(--blanc);
}
.calc-camps input[type="range"] { width: 100%; accent-color: var(--roig); }
.calc-resultats {
  display: grid; gap: 1rem; margin-top: 1.5rem;
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 700px) { .calc-resultats { grid-template-columns: repeat(4, 1fr); } }
.resultat { border-top: 3px solid var(--gris-clar); padding-top: .4rem; }
.resultat strong { display: block; font-size: 1.7rem; font-weight: 800; }
.resultat span { font-size: .8rem; color: var(--gris); }
.resultat.ok strong { color: var(--verd); }
.resultat.alerta strong { color: var(--taronja); }
.resultat.perill strong { color: var(--roig); }
.calc-nota { font-size: .75rem; color: var(--gris); margin-top: 1rem; }
button.compartir {
  margin-top: 1rem; background: var(--negre); color: var(--blanc);
  font-size: 1rem; font-weight: 700; border: 0; padding: .7rem 1.2rem;
  border-radius: 4px; cursor: pointer;
}
button.compartir:hover { background: var(--roig-fosc); }

/* ---------- mapa ---------- */
#elMapa {
  height: 26rem; border: 1px solid var(--gris-clar); border-radius: 4px;
  background: #dfe8ee; z-index: 1;
}
@media (min-width: 700px) { #elMapa { height: 32rem; } }
.commutador { margin: 1rem 0 .8rem; }
.commutador button {
  font-size: .95rem; font-weight: 700; padding: .5rem 1rem; cursor: pointer;
  border: 2px solid var(--negre); background: var(--blanc); color: var(--negre);
  border-radius: 4px 0 0 4px;
}
.commutador button + button { border-left: 0; border-radius: 0 4px 4px 0; }
.commutador button.actiu { background: var(--negre); color: var(--blanc); }
.llegenda { font-size: .8rem; color: var(--gris); line-height: 1.9; }
.llegenda .clau {
  display: inline-block; width: .9rem; height: .9rem; vertical-align: -2px;
  margin-right: .25rem; border: 1px solid rgba(0,0,0,.15);
}

/* ---------- dades clau (SEO/AEO) ---------- */
#dades-clau ul { padding-left: 1.2rem; }
#dades-clau li { margin: .4rem 0; }

/* ---------- metodologia ---------- */
#metodologia table { border-collapse: collapse; width: 100%; font-size: .85rem; }
#metodologia th, #metodologia td {
  border: 1px solid var(--gris-clar); padding: .4rem .6rem; text-align: left;
  vertical-align: top;
}
#metodologia th { background: var(--gris-clar); }

/* ---------- CTA ---------- */
#cta { background: var(--negre); color: var(--blanc); text-align: center; }
#cta h2 { color: var(--blanc); }
#cta a.boto {
  display: inline-block; background: var(--roig); color: var(--blanc);
  font-weight: 800; text-decoration: none; padding: .8rem 1.6rem;
  border-radius: 4px; margin: .5rem;
}
#cta a.boto:hover { background: var(--roig-fosc); }

footer.peu {
  background: var(--negre); color: var(--blanc); font-size: .8rem;
  padding: 1rem 0 2rem; opacity: .85;
}
footer.peu a { color: var(--blanc); }

/* accessibilitat */
.visualment-ocult {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
:focus-visible { outline: 3px solid var(--roig); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}