/* Campus Virtual UCVnet — identidad UCV */
:root {
  --verde: #67823a;
  --verde-texto: #55702d; /* texto y botones: 5,6:1 sobre blanco */
  --negro: #1a171b;
  --lima: #93c90e;
  --claro: #b7ce95;
  --oscuro: #284734;
  --fondo: #f6f8f2;
  --papel: #ffffff;
  --texto: #1a171b;
  --texto-suave: #4b4d46;
  --linea: #dfe6d3;
  --radio: 14px;
  --sombra: 0 1px 2px rgba(26, 23, 27, .06), 0 8px 24px rgba(40, 71, 52, .08);
  --serif: "TheSerif", Georgia, "Book Antiqua", serif;
  --sans: "Roboto", Calibri, Arial, sans-serif;
  --ancho: 1160px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { animation: none !important; transition: none !important; } }
body { margin: 0; font-family: var(--sans); font-size: 17px; line-height: 1.6; color: var(--texto); background: var(--fondo); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--verde-texto); text-underline-offset: 3px; }
a:hover { color: var(--oscuro); }
:focus-visible { outline: 3px solid var(--oscuro); outline-offset: 2px; border-radius: 4px; }
.topbar :focus-visible, .hero :focus-visible, .page-hero :focus-visible, .site-footer :focus-visible, .card--oscura :focus-visible { outline-color: var(--lima); }
h1, h2, h3 { font-family: var(--serif); line-height: 1.15; color: var(--oscuro); margin: 0 0 .5em; font-weight: 700; }
h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
.wrap { width: min(100% - 2rem, var(--ancho)); margin-inline: auto; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 1rem; top: -4rem; background: var(--lima); color: var(--negro); padding: .6rem 1rem; border-radius: 8px; z-index: 100; font-weight: 700; }
.skip:focus { top: 1rem; }

/* Barra superior */
.topbar { background: var(--oscuro); color: #e8efdc; font-size: .85rem; }
.topbar .wrap { display: flex; justify-content: space-between; gap: 1rem; padding-block: .45rem; }
.topbar a { color: var(--claro); text-decoration: none; }
.topbar a:hover { color: #fff; text-decoration: underline; }

/* Cabecera */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .94); backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--linea); }
.site-header__in { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; min-height: 72px; }
.brand { display: flex; align-items: center; gap: .9rem; text-decoration: none; }
.brand img { height: 44px; width: auto; }
.brand__net { font-family: var(--serif); font-weight: 800; font-size: 1.35rem; color: var(--verde-texto); padding-left: .9rem; border-left: 2px solid var(--lima); line-height: 1; }

.nav ul { list-style: none; margin: 0; padding: 0; }
.nav > ul { display: flex; align-items: center; gap: .25rem; }
.nav a, .nav__btn { display: block; font: 500 .95rem/1 var(--sans); color: var(--negro); text-decoration: none; padding: .8rem .95rem; border-radius: 999px; background: none; border: 0; cursor: pointer; }
.nav a:hover, .nav__btn:hover, .nav .has-sub:focus-within > .nav__btn { background: #eef3e4; color: var(--oscuro); }
.nav__btn::after { content: ""; display: inline-block; width: .45em; height: .45em; margin-left: .5em; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: translateY(-.15em) rotate(45deg); }
.has-sub { position: relative; }
.sub { position: absolute; left: 0; top: 100%; min-width: 250px; padding: .5rem; background: var(--papel); border: 1px solid var(--linea); border-radius: 12px; box-shadow: var(--sombra); display: none; }
.sub a { border-radius: 8px; padding: .7rem .85rem; }
.has-sub:hover > .sub, .has-sub.open > .sub, .has-sub:focus-within > .sub { display: block; }

.nav-toggle { display: none; min-height: 44px; align-items: center; gap: .6rem; background: var(--verde-texto); color: #fff; border: 0; border-radius: 999px; padding: .65rem 1.1rem; font: 500 .95rem var(--sans); cursor: pointer; }
.nav-toggle .bars, .nav-toggle .bars::before, .nav-toggle .bars::after { display: block; width: 18px; height: 2px; background: currentColor; border-radius: 2px; content: ""; position: relative; }
.nav-toggle .bars::before { position: absolute; top: -6px; }
.nav-toggle .bars::after { position: absolute; top: 6px; }

/* Botones */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; padding: .85rem 1.5rem; border-radius: 999px; font: 700 1rem/1.2 var(--sans); text-decoration: none; border: 2px solid transparent; transition: transform .15s, background .15s, color .15s; }
.btn:hover { transform: translateY(-2px); }
.btn--lima { background: var(--lima); color: var(--negro); }
.btn--lima:hover { background: #a6dd1d; color: var(--negro); }
.btn--verde { background: var(--verde-texto); color: #fff; }
.btn--verde:hover { background: var(--oscuro); color: #fff; }
.btn--ghost { border-color: rgba(255, 255, 255, .7); color: #fff; }
.btn--ghost:hover { background: #fff; color: var(--oscuro); }
.btn--line { border-color: var(--verde-texto); color: var(--verde-texto); }
.btn--line:hover { background: var(--verde-texto); color: #fff; }

/* Hero portada */
.hero { position: relative; overflow: hidden; color: #fff; background: var(--oscuro); isolation: isolate; }
.hero__slides, .hero__slides img { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero__slides img { object-fit: cover; opacity: 0; transition: opacity 1.2s ease; }
.hero__slides img.on { opacity: 1; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(100deg, rgba(40, 71, 52, .95) 12%, rgba(40, 71, 52, .6) 55%, rgba(40, 71, 52, .25)); }
.hero .wrap { position: relative; z-index: 2; padding-block: clamp(3.5rem, 9vw, 7rem); }
.eyebrow { display: inline-block; font: 700 .8rem/1 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--lima); margin-bottom: 1rem; }
.hero h1 { color: #fff; max-width: 14ch; }
.hero .lead { max-width: 52ch; font-size: 1.2rem; color: #e8efdc; }
.hero__cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.8rem; }

/* Secciones */
.section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.section--claro { background: var(--papel); border-block: 1px solid var(--linea); }
.section__head { max-width: 62ch; margin-bottom: 2rem; }
.section__head p { color: var(--texto-suave); }
.cards { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card { background: var(--papel); border: 1px solid var(--linea); border-radius: var(--radio); padding: 1.6rem; box-shadow: var(--sombra); display: flex; flex-direction: column; gap: .4rem; position: relative; }
.card::before { content: ""; position: absolute; left: 1.6rem; top: 0; width: 44px; height: 4px; background: var(--lima); border-radius: 0 0 4px 4px; }
.card h3 { margin-top: .6rem; }
.card p { color: var(--texto-suave); flex: 1; }
.card .btn { align-self: flex-start; margin-top: .6rem; }
.card .btn + a { margin-top: .4rem; font-size: .95rem; }
.card--oscura { background: var(--oscuro); border-color: var(--oscuro); color: #e8efdc; }
.card--oscura h3 { color: #fff; }
.card--oscura p { color: #d6e2c4; }
.card--oscura .btn--line { border-color: var(--lima); color: var(--lima); }
.card--oscura .btn--line:hover { background: var(--lima); color: var(--negro); }
.split { display: grid; gap: 2rem; grid-template-columns: 1.1fr .9fr; align-items: center; }
.split ul { padding-left: 1.2rem; }
.split li { margin-bottom: .5rem; }
.thumbs { display: flex; gap: 1rem; }
.thumbs img { border-radius: var(--radio); box-shadow: var(--sombra); width: 50%; object-fit: cover; }
.aviso { background: #eef3e4; border-left: 5px solid var(--lima); border-radius: 10px; padding: 1.2rem 1.4rem; }

/* Cabecera de página interior */
.page-hero { position: relative; color: #fff; background: var(--oscuro) var(--hero) center / cover; isolation: isolate; }
.page-hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(100deg, rgba(40, 71, 52, .92), rgba(40, 71, 52, .4)); }
.page-hero .wrap { padding-block: clamp(2.2rem, 6vw, 4rem); }
.page-hero h1 { color: #fff; margin-bottom: .3em; }
.page-hero .lead { color: #e8efdc; max-width: 60ch; margin: 0; font-size: 1.1rem; }
.crumbs { font-size: .85rem; margin-bottom: 1rem; color: var(--claro); }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: .4rem; margin: 0; padding: 0; }
.crumbs li + li::before { content: "/"; margin-right: .4rem; opacity: .6; }
.crumbs a { color: #fff; }

/* Contenido */
.prose { max-width: 78ch; }
.prose p { color: #2b2d27; }
.prose h2 { margin-top: 2rem; }
.prose ul { padding-left: 1.2rem; }
.prose li { margin-bottom: .4rem; }
.grid-2 { display: grid; gap: 2rem; grid-template-columns: 2fr 1fr; align-items: start; }
.stack { display: grid; gap: 1.25rem; }
.dato { margin: 0 0 1rem; }
.dato dt { font: 700 .8rem/1 var(--sans); letter-spacing: .1em; text-transform: uppercase; color: var(--verde-texto); margin-bottom: .3rem; }
.dato dd { margin: 0; }

/* Guías (listas de PDF) */
.guias { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); align-items: start; }
.guia { background: var(--papel); border: 1px solid var(--linea); border-radius: var(--radio); box-shadow: var(--sombra); padding: 1.5rem; }
.guia > h2 { display: flex; gap: .8rem; align-items: center; font-size: 1.1rem; letter-spacing: .02em; text-transform: uppercase; margin-bottom: 1rem; }
.guia .num { flex: none; display: grid; place-items: center; width: 2.2rem; height: 2.2rem; border-radius: 50%; background: var(--verde-texto); color: #fff; font: 700 1rem var(--sans); }
.grupo + .grupo { margin-top: 1.2rem; }
.grupo h3 { font: 700 .8rem/1.3 var(--sans); letter-spacing: .08em; text-transform: uppercase; color: var(--verde-texto); border-bottom: 1px solid var(--linea); padding-bottom: .4rem; margin-bottom: .5rem; }
.enlaces { list-style: none; margin: 0; padding: 0; }
.enlaces a { display: flex; gap: .6rem; padding: .45rem .5rem; margin-inline: -.5rem; border-radius: 8px; text-decoration: none; color: var(--texto); font-size: .95rem; line-height: 1.4; }
.enlaces a::before { content: "PDF"; flex: none; align-self: flex-start; margin-top: .15rem; font: 700 .65rem/1 var(--sans); padding: .3rem .4rem; border-radius: 4px; background: #eef3e4; color: var(--verde-texto); }
.enlaces a.ext::before { content: "VÍDEO"; background: #f0e9f7; color: #604993; }
.enlaces a:hover { background: #eef3e4; color: var(--oscuro); }

/* Pie */
.site-footer { background: var(--oscuro); color: #d6e2c4; margin-top: 0; }
.site-footer .wrap { display: grid; gap: 2rem; grid-template-columns: 1.2fr 1fr 1fr; padding-block: 3rem; }
.site-footer img { height: 48px; width: auto; margin-bottom: 1rem; }
.site-footer h2 { font: 700 .8rem/1 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--lima); margin-bottom: 1rem; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: .45rem; }
.site-footer a { color: #fff; text-decoration: none; }
.site-footer a:hover { color: var(--lima); text-decoration: underline; }
.site-footer address { font-style: normal; }
.legal { border-top: 1px solid rgba(255, 255, 255, .15); font-size: .85rem; }
.legal .wrap { display: flex; justify-content: space-between; padding-block: 1rem; grid-template-columns: none; }

/* Responsive */
@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
  .nav { position: absolute; left: 0; right: 0; top: 100%; background: var(--papel); border-bottom: 1px solid var(--linea); box-shadow: var(--sombra); max-height: calc(100vh - 110px); overflow: auto; display: none; }
  .nav.open { display: block; }
  .nav > ul { flex-direction: column; align-items: stretch; padding: .75rem 1rem 1.25rem; gap: 0; }
  .nav a, .nav__btn { padding: .9rem .6rem; border-radius: 8px; width: 100%; text-align: left; }
  .nav__btn { font-weight: 700; color: var(--verde-texto); pointer-events: none; }
  .nav__btn::after { display: none; }
  .sub { position: static; display: block; box-shadow: none; border: 0; padding: 0 0 .5rem .8rem; border-left: 2px solid var(--lima); border-radius: 0; margin-left: .6rem; }
  .split, .grid-2, .site-footer .wrap { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .topbar .wrap { flex-direction: column; gap: .2rem; }
  .brand__net { display: none; }
  .hero__cta .btn { width: 100%; }
  .legal .wrap { flex-direction: column; gap: .3rem; }
}

/* Correo protegido */
.correo { cursor: pointer; }

/* Objetivos táctiles */
.crumbs a { display: inline-block; padding: .45rem 0; }
.topbar a { display: inline-block; padding: .3rem 0; }
.site-footer li { margin-bottom: .1rem; }
.site-footer li a { display: inline-block; padding: .35rem 0; }
@media (max-width: 960px), (pointer: coarse) { .enlaces a { padding-block: .75rem; } }

/* Página actual en el menú */
.nav a[aria-current="page"] { background: #e3ecd3; color: var(--oscuro); font-weight: 700; }
.nav .has-sub:has([aria-current="page"]) > .nav__btn { background: #e3ecd3; color: var(--oscuro); font-weight: 700; }
.eyebrow--tinta { color: var(--verde-texto); }

/* Buscador y atajos de las guías */
.herramientas { display: grid; gap: 1rem; margin-bottom: 1.5rem; }
.buscador label { display: block; font: 700 .8rem/1 var(--sans); letter-spacing: .08em; text-transform: uppercase; color: var(--verde-texto); margin-bottom: .5rem; }
.buscador input { width: 100%; min-height: 48px; padding: .75rem 1rem; font: 400 1rem var(--sans); color: var(--texto); background: var(--papel); border: 2px solid var(--claro); border-radius: 12px; }
.buscador input:focus { border-color: var(--verde-texto); }
.buscador__estado { margin: .5rem 0 0; min-height: 1.5em; font-size: .9rem; color: var(--texto-suave); }
.atajos { display: flex; flex-wrap: wrap; gap: .5rem; list-style: none; margin: 0; padding: 0; }
.atajos a { display: inline-flex; align-items: center; min-height: 44px; padding: .4rem 1rem; border: 1px solid var(--linea); border-radius: 999px; background: var(--papel); color: var(--oscuro); font-size: .9rem; font-weight: 500; text-decoration: none; }
.atajos a:hover { background: #eef3e4; }
.guia { scroll-margin-top: 96px; }
.guia[hidden], .grupo[hidden], .enlaces li[hidden], .sin-resultados[hidden] { display: none; }
.sin-resultados { grid-column: 1 / -1; }