/* Paleta A «Cuaderno corregido» (marca/identidad.md) */
:root {
  --fondo: #14171C; --papel: #F7F4EE; --tinta: #1F2A44; --corrector: #D64545; --agua: #2A78D6;
  --texto-claro: #F7F4EE; --gris: #5A6273; --linea: #E2DCCF;
  --letra: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: var(--letra); color: var(--tinta); background: var(--papel); line-height: 1.55; font-size: 17px; }
a { color: #1F6AC4; } /* agua oscurecido para contraste AA sobre papel y blanco */
.ac { color: var(--corrector); }

.cab { position: sticky; top: 0; z-index: 10; display: flex; justify-content: space-between; align-items: center; gap: 16px;
       padding: 14px 6vw; background: var(--fondo); }
.cab .logo { height: 30px; display: block; }
.cab nav { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.cab nav a { color: var(--texto-claro); text-decoration: none; font-size: 15px; }

section { padding: 72px 6vw; max-width: 1180px; margin: 0 auto; }
section.oscuro { max-width: none; background: var(--fondo); color: var(--texto-claro); }
section.oscuro > * { max-width: 1060px; margin-left: auto; margin-right: auto; }
h1 { font-size: clamp(30px, 4.6vw, 54px); line-height: 1.12; margin: 8px 0 20px; letter-spacing: -.02em; }
h2 { font-size: clamp(26px, 3.2vw, 38px); line-height: 1.15; margin: 0 0 14px; letter-spacing: -.01em; }
h3 { font-size: 21px; margin: 0 0 8px; }
.ceja { font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--corrector); font-weight: 600; margin: 0; }
.entradilla { font-size: 19px; max-width: 780px; color: inherit; opacity: .9; }

.portada { padding-top: 90px; }
.tres { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; margin: 34px 0 20px; }
.tarjeta { display: block; padding: 22px; border: 1px solid var(--linea); border-radius: 14px; background: #fff; color: var(--tinta); text-decoration: none; }
.tarjeta b { display: block; font-size: 19px; margin-bottom: 6px; }
.tarjeta:hover { border-color: var(--corrector); }
.franja { font-size: 14px; letter-spacing: .04em; color: var(--gris); border-top: 1px solid var(--linea); padding-top: 14px; }

.columnas { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; margin-top: 26px; }
article { background: #fff; border: 1px solid var(--linea); border-radius: 14px; padding: 24px; }
article.prep { background: transparent; border-style: dashed; }
.situacion { font-style: italic; color: var(--gris); }
article ul { padding-left: 18px; }
.para { font-size: 15px; }
.etq { font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--corrector); border: 1px solid var(--corrector);
       border-radius: 20px; padding: 2px 8px; vertical-align: middle; margin-left: 6px; white-space: nowrap; display: inline-block; }
.clientes { margin-top: 30px; display: grid; gap: 6px; max-width: 860px; }
.centro { text-align: center; margin-top: 26px; }

.boton { display: inline-block; background: #CC3F3F; /* corrector un punto más oscuro: contraste AA con texto blanco */ color: #fff !important; text-decoration: none; padding: 11px 20px; border-radius: 10px;
         font-weight: 600; border: 0; font-size: 16px; cursor: pointer; }
.boton.sec { background: transparent; color: #CC3F3F !important; border: 1.5px solid #CC3F3F; }

.compromisos { padding-left: 20px; display: grid; gap: 10px; max-width: 820px; font-size: 18px; }
.nota { font-size: 15px; opacity: .8; max-width: 820px; }

.formulario { display: grid; gap: 12px; max-width: 560px; margin-top: 20px; }
.formulario input[type=email], .formulario input[type=text], .formulario select, .formulario textarea {
  padding: 12px 14px; border-radius: 10px; border: 1px solid #3A4150; background: #1C2028; color: var(--texto-claro); font: inherit; }
.formulario fieldset { border: 1px solid #3A4150; border-radius: 10px; padding: 12px 14px; display: grid; gap: 6px; }
.formulario legend { padding: 0 6px; font-size: 15px; }
.formulario label { font-size: 15px; }
.formulario .rgpd { font-size: 13px; opacity: .85; }
.formulario .rgpd a, .oscuro a { color: #8DB8EE; }
.ok { font-size: 18px; }
.trampa { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.aviso-form:empty { display: none; }

.sobre { display: grid; grid-template-columns: 180px 1fr; gap: 28px; align-items: start; }
.foto { width: 180px; height: 180px; border-radius: 50%; background: var(--linea); display: grid; place-items: center; color: var(--gris); font-size: 14px; }
.pubs { font-size: 15px; padding-left: 18px; }
@media (max-width: 640px) { .sobre { grid-template-columns: 1fr; } .cab nav a:not(.boton) { display: none; } }

.pie { background: var(--fondo); color: var(--texto-claro); text-align: center; padding: 36px 6vw; font-size: 15px; }
.pie a { color: #8DB8EE; }
.pie .iso { height: 46px; }
.pie .peq { font-size: 13px; opacity: .7; }

/* Páginas generadas (construir.py) */
.doc { max-width: 820px; margin: 0 auto; padding: 56px 6vw 64px; }
.doc h1 { margin-top: 0; }
.doc h2 { margin-top: 44px; font-size: clamp(22px, 2.6vw, 30px); }
.doc h3 { margin-top: 26px; }
.doc table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 18px 0; }
.doc th, .doc td { border-bottom: 1px solid var(--linea); padding: 8px 10px; text-align: left; vertical-align: top; }
.doc blockquote { margin: 18px 0; padding: 4px 18px; border-left: 4px solid var(--corrector); color: var(--gris); }
.fecha { color: var(--gris); font-size: 14px; margin-top: -10px; }
.t-inicio .doc h1 { font-size: clamp(32px, 4.6vw, 52px); }
.caja-form { background: var(--fondo); color: var(--texto-claro); border-radius: 16px; padding: 28px; margin: 40px 0; }
.caja-form h2 { margin-top: 0; color: var(--texto-claro); }
.caja-form a { color: #8DB8EE; }
.formulario label { display: grid; gap: 4px; }
.formulario .rgpd, .formulario fieldset label { display: block; }
.articulos { list-style: none; padding: 0; display: grid; gap: 14px; }
.articulos li { background: #fff; border: 1px solid var(--linea); border-radius: 12px; padding: 16px 18px; }
.articulos a { text-decoration: none; color: var(--tinta); font-size: 18px; }
.articulos span { display: block; color: var(--gris); font-size: 15px; margin-top: 4px; }
.pie nav { margin: 10px 0; line-height: 2; }