/* Estilo early-2000s con paleta institucional U. Adolfo Ibáñez (azul). */

:root {
  --bg: #e8eaf0;
  --bg-content: #f6f7fa;
  --surface: #ffffff;
  --text: #11141c;
  --text-soft: #20242e;
  --muted: #5a6072;
  --line: #b8bccd;
  --line-soft: #d6d9e3;
  --utalca: #003b80;        /* azul institucional UAI */
  --utalca-dark: #001f4d;
  --utalca-light: #3361b8;
  --link: var(--utalca);
  --link-visited: #1f3a72;
  --link-hover: #001f4d;
  --header-bg: var(--utalca);
  --header-text: #ffffff;
  --tab-active: var(--utalca-dark);
  --serif: Georgia, "Times New Roman", Times, serif;
  --sans: Verdana, Tahoma, "Trebuchet MS", Geneva, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.5;
}

a { color: var(--link); text-decoration: underline; }
a:visited { color: var(--link-visited); }
a:hover { color: var(--link-hover); }

img { max-width: 100%; display: block; }

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Topbar */
.topbar {
  background: var(--header-bg);
  background-image: linear-gradient(to bottom, #3361b8 0%, #001f4d 100%);
  color: var(--header-text);
  border-bottom: 3px double #00102b;
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 1px 0 rgba(255,255,255,.18) inset, 0 2px 4px rgba(0,0,0,.18);
}
.topbar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-top: 6px;
  padding-bottom: 6px;
  min-height: 38px;
}
.brand {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none !important;
  color: #fff !important;
  white-space: nowrap;
  letter-spacing: .2px;
}
.brand:hover { color: #ffe066 !important; }

.filtros {
  display: flex;
  gap: 0;
  margin-left: auto;
  flex-wrap: wrap;
}
.chip {
  background: linear-gradient(to bottom, #3361b8 0%, #002b6b 100%);
  color: #fff;
  border: 1px solid #00102b;
  border-bottom: none;
  border-radius: 4px 4px 0 0;
  padding: 4px 10px;
  margin-right: 2px;
  font-size: 11px;
  font-family: inherit;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
  cursor: pointer;
  text-shadow: 0 1px 0 rgba(0,0,0,.3);
}
.chip:hover { background: linear-gradient(to bottom, #4577ce 0%, #003c91 100%); }
.chip.activo {
  background: var(--bg-content);
  color: var(--tab-active);
  border-color: #4a0019;
  text-shadow: none;
}

#q {
  background: #fff;
  border: 1px solid #00102b;
  border-radius: 2px;
  padding: 3px 6px;
  font-size: 12px;
  font-family: inherit;
  color: var(--text);
  outline: none;
  width: 140px;
}
#q:focus { border-color: #f5b800; box-shadow: 0 0 0 1px #f5b800; }

/* Tagbar: chips de tags populares para filtrar */
.tagbar {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  align-items: center;
  padding: 6px 16px;
  background: #dde2ec;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  margin: 0;
}
.tagbar:empty { display: none; padding: 0; }
.tagbar__label {
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
  margin-right: 6px;
}
.tagbar__tag {
  background: #fff;
  color: var(--utalca-dark);
  border: 1px solid #b8bccd;
  border-radius: 2px;
  padding: 1px 7px;
  font-size: 11px;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.tagbar__tag:hover { background: #eef2f9; border-color: var(--utalca); }
.tagbar__tag.activo {
  background: var(--utalca);
  color: #fff;
  border-color: var(--utalca-dark);
}
.tagbar__tag .count {
  opacity: .55;
  font-weight: 400;
  margin-left: 3px;
}
.tagbar__more {
  background: transparent;
  border: 0;
  color: var(--utalca);
  font-size: 11px;
  cursor: pointer;
  padding: 1px 4px;
  text-decoration: underline;
  font-family: inherit;
}

/* Subbar: filtro por fuente */
.subbar {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  align-items: center;
  padding: 6px 16px;
  background: var(--bg-content);
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  margin: 0;
}
.subbar:empty { display: none; padding: 0; }
.subbar .pill {
  background: #fff;
  color: var(--link);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 2px 8px;
  font-size: 11px;
  font-family: inherit;
  font-weight: 400;
  cursor: pointer;
}
.subbar .pill:hover { background: #fffbe6; border-color: #b58c20; }
.subbar .pill.activo {
  background: var(--utalca);
  color: #fff;
  border-color: var(--utalca-dark);
  font-weight: 700;
}

/* Intro */
.intro {
  background: var(--bg-content);
  border-bottom: 1px solid var(--line);
  padding: 28px 16px 22px;
  margin: 0 auto;
  max-width: none;
}
.intro__inner {
  max-width: 760px;
  margin: 0 auto;
}
.intro__kicker {
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
  margin: 0 0 8px;
}
.intro h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 32px;
  line-height: 1.1;
  margin: 0 0 8px;
  color: #1a1a1a;
  letter-spacing: -.5px;
}
.lede {
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.5;
  color: #333;
  margin: 0 0 12px;
  max-width: 580px;
}
.meta {
  font-size: 11px;
  color: var(--muted);
  margin: 0;
  font-style: italic;
}

/* Feed */
.feed {
  padding: 18px 16px 4px;
  background: var(--bg-content);
  max-width: none;
}
.feed > * { max-width: 760px; margin-left: auto; margin-right: auto; }

.post {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 12px;
  margin: 0 auto 14px;
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 14px;
  box-shadow: 1px 1px 0 #fff inset, 1px 1px 3px rgba(120,90,30,.08);
  scroll-margin-top: 110px;
  min-height: 135px;          /* uniforma altura entre cards */
}

.post__main {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.post__imagen {
  display: block;
  width: 130px;
  height: 95px;
  overflow: hidden;
  background: #eee;
  border: 1px solid var(--line-soft);
  position: relative;
  text-decoration: none;
}
.post__imagen img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

/* Thumbnail generado para items académicos: fondo carmín con año grande */
.post__thumb-academico {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background:
    repeating-linear-gradient(
      45deg,
      transparent 0 8px,
      rgba(255,255,255,.04) 8px 16px
    ),
    linear-gradient(135deg, var(--utalca) 0%, var(--utalca-dark) 100%);
  color: #fff;
  text-align: center;
  padding: 6px;
  gap: 2px;
}
.post__thumb-academico .ta-año {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.5px;
  color: #ffc94d;
  text-shadow: 1px 1px 0 rgba(0,0,0,.35);
}
.post__thumb-academico .ta-tipo {
  font-family: var(--sans);
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  opacity: .85;
  font-weight: 700;
}
.post__thumb-academico .ta-fuente {
  font-family: var(--sans);
  font-size: 9px;
  font-style: italic;
  opacity: .8;
  margin-top: 4px;
  border-top: 1px solid rgba(255,255,255,.25);
  padding-top: 3px;
  width: 80%;
}

.post__head { margin-bottom: 6px; flex: 1 1 auto; }

.post__meta {
  font-size: 10px;
  letter-spacing: .5px;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 4px;
  font-weight: 700;
}
.post__sep { margin: 0 4px; opacity: .6; }
.post__tipo {
  /* highlighter amarillo, estilo bloc de notas / Wordpress 2007 */
  background-image: linear-gradient(transparent 55%, #fff36a 55%);
  background-repeat: no-repeat;
  padding: 0 3px;
  color: #2a2200;
}
.post__fuente {
  color: var(--muted);
  font-weight: 400;
  font-style: italic;
  text-transform: none;
  letter-spacing: 0;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  vertical-align: middle;
}
.post__favicon {
  width: 14px;
  height: 14px;
  display: inline-block;
  vertical-align: middle;
  border-radius: 2px;
  flex-shrink: 0;
}
.post__favicon[src=""] { display: none; }

.post__titulo {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.2;
  margin: 0 0 4px;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;        /* máx 2 líneas */
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post__titulo a {
  color: var(--link);
  text-decoration: none;
}
.post__titulo a:hover { color: var(--link-hover); text-decoration: underline; }
.post__titulo a:visited { color: var(--link-visited); }

.post__bajada {
  font-family: var(--serif);
  font-style: italic;
  font-size: 12px;
  color: #555;
  margin: 0 0 6px;
  line-height: 1.4;
}
.post__bajada:empty { display: none; }

/* Excerpt corto debajo del título — la card es preview, no lectura */
.post__excerpt {
  font-family: var(--serif);
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--text-soft);
  margin: 4px 0 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  min-height: calc(12.5px * 1.5 * 3);  /* reserva espacio aunque esté vacío */
}

/* Académico: variantes */
.post.academico .post__titulo { font-size: 14px; }
.post.academico .post__excerpt {
  font-style: italic;
  color: var(--muted);
}

/* Thumbnail generado para apariciones en prensa: nombre del medio */
.post__thumb-prensa {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background:
    repeating-linear-gradient(
      0deg,
      transparent 0 4px,
      rgba(0,0,0,.04) 4px 5px
    ),
    linear-gradient(180deg, #f8eedb 0%, #e7d5a3 100%);
  color: #3a2a05;
  text-align: center;
  padding: 6px;
  gap: 3px;
}
.post__thumb-prensa .tp-medio {
  font-family: var(--serif);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.2px;
  word-break: break-word;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post__thumb-prensa .tp-tipo {
  font-family: var(--sans);
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  opacity: .7;
  font-weight: 700;
  margin-top: 4px;
  border-top: 1px solid rgba(0,0,0,.18);
  padding-top: 3px;
  width: 80%;
}

/* Videos: ícono de play encima del thumbnail */
.post[data-fuente="youtube"] .post__imagen::after {
  content: "▶";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  color: #fff;
  text-shadow:
    0 1px 4px rgba(0,0,0,.6),
    0 0 18px rgba(0,0,0,.4);
  pointer-events: none;
  opacity: .85;
  transition: opacity .2s, transform .2s;
}
.post[data-fuente="youtube"] .post__imagen:hover::after {
  opacity: 1;
  transform: scale(1.12);
}

/* Tags inline en cada card */
.post__tags {
  list-style: none;
  padding: 0;
  margin: 6px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
}
.post__tags li { margin: 0; }
.post__tags button {
  background: #e8eef9;
  border: 1px solid #aebed8;
  color: #002b6b;
  border-radius: 2px;
  font-size: 10px;
  font-family: inherit;
  font-weight: 600;
  padding: 0 5px;
  cursor: pointer;
  letter-spacing: .2px;
}
.post__tags button:hover {
  background: var(--utalca);
  border-color: var(--utalca-dark);
  color: #fff;
}
.post__tags:empty { display: none; }

.post__foot {
  margin-top: auto;            /* fijo al fondo de la card */
  padding-top: 8px;
  font-size: 11px;
}
.post__original {
  color: var(--link);
  text-decoration: underline;
}
.post__original:hover { color: var(--link-hover); }

.vacio,
.fin {
  text-align: center;
  color: var(--muted);
  padding: 28px 16px;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 700;
  font-style: italic;
}

.centinela {
  height: 1px;
  margin: 0;
  padding: 32px 0;
  visibility: hidden;
}

.footer {
  background: #2a2a2a;
  color: #cfcfcf;
  padding: 14px 0;
  font-size: 11px;
  text-align: center;
  border-top: 3px double #555;
}
.footer a { color: #ffd166; }

::selection { background: #ffd166; color: #000; }

/* Responsivo: en móvil, foto arriba, contenido abajo */
@media (max-width: 540px) {
  body { font-size: 12px; }
  .post {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .post__imagen {
    width: 100%;
    height: 160px;
  }
  .intro { padding: 22px 16px 18px; }
  .intro h1 { font-size: 26px; }
  .lede { font-size: 14px; }
  #q { width: 90px; }
  .topbar__inner { gap: 6px; }
  .brand { font-size: 13px; }
  .chip { font-size: 10px; padding: 3px 7px; }
}