/* Radar IA - identidad Ezequiel Bossio (grafito, platino, acero).
   Neutrales de la marca; acero (#4E8F97) como unico acento, casi siempre lineal. */
:root {
  --paper: #f2f3f4;      /* platino claro */
  --surface: #ffffff;    /* blanco, tarjetas */
  --ink: #22262a;        /* grafito, texto principal */
  --muted: #6b7075;      /* gris de texto secundario */
  --faint: #7c8288;      /* gris tenue, etiquetas decorativas */
  --line: #e3e6e8;
  --line-strong: #ccd0d3;
  --steel: #4e8f97;      /* acero, acento lineal */
  --accent: #4e8f97;     /* acero para reglas y bordes */
  --accent-ink: #356a70; /* acero oscurecido, legible como texto/enlace */
  --accent-soft: #e8f0f0;
  --mirada: #eef3f3;
  --mirada-rule: #4e8f97;
  --radius: 12px;
  --maxw: 720px;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "IBM Plex Sans", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #16191c;    /* grafito profundo */
    --surface: #22262a;  /* grafito */
    --ink: #e7eaec;      /* casi platino */
    --muted: #9aa0a5;    /* gris sobre grafito */
    --faint: #7c848a;
    --line: #3b4045;     /* linea sobre grafito */
    --line-strong: #4a5157;
    --steel: #4e8f97;
    --accent: #6fb0b7;
    --accent-ink: #8fc6cd;
    --accent-soft: #1c2a2c;
    --mirada: #1a2426;
    --mirada-rule: #4e8f97;
  }
}
:root[data-theme="dark"] {
  --paper: #16191c; --surface: #22262a; --ink: #e7eaec; --muted: #9aa0a5;
  --faint: #7c848a; --line: #3b4045; --line-strong: #4a5157;
  --steel: #4e8f97; --accent: #6fb0b7; --accent-ink: #8fc6cd;
  --accent-soft: #1c2a2c; --mirada: #1a2426; --mirada-rule: #4e8f97;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--serif); font-size: 19px; line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-ink); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 3px solid var(--steel); outline-offset: 2px;
}
.skip-link { position: absolute; left: -999px; background: var(--ink); color: var(--paper); padding: 8px 14px; }
.skip-link:focus { left: 0; top: 0; z-index: 10; }

/* Cabecera y lockup */
.site-header { border-bottom: 1px solid var(--line-strong); background: var(--paper); }
.site-nav {
  max-width: var(--maxw); margin: 0 auto; padding: 18px 22px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand-mark { display: block; width: 30px; height: auto; color: var(--ink); flex: none; }
.brand-name {
  font-family: var(--sans); font-weight: 500; font-size: 1.22rem; letter-spacing: -.01em; color: var(--ink);
  padding-left: 12px; border-left: 1px solid var(--steel); line-height: 1;
}
.nav-links { list-style: none; display: flex; gap: 18px; margin: 0; padding: 0; font-family: var(--sans); font-size: 14px; }
.nav-links a { text-decoration: none; color: var(--muted); }
.nav-links a:hover { color: var(--ink); }

.site-main { max-width: var(--maxw); margin: 0 auto; padding: 30px 22px; }
.site-footer { border-top: 1px solid var(--line); color: var(--faint); font-family: var(--sans); font-size: 13px; }
.site-footer nav { max-width: var(--maxw); margin: 0 auto; padding: 18px 22px 4px; display: flex; gap: 18px; flex-wrap: wrap; }
.site-footer nav a { color: var(--muted); }
.site-footer p { max-width: var(--maxw); margin: 0 auto; padding: 4px 22px 26px; }

h1 { font-size: 2.05rem; line-height: 1.16; margin: 0 0 16px; font-weight: 600; letter-spacing: -.015em; text-wrap: balance; }
h2 { font-family: var(--sans); font-size: 1.15rem; font-weight: 500; margin: 26px 0 8px; }

/* Etiquetas de categoria y nivel (acero lineal, sin acero como fondo) */
.kicker { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; font-family: var(--sans); margin-bottom: 14px; }
.tag-cat { font-size: 11.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--accent-ink); background: var(--accent-soft); border: 1px solid var(--steel); padding: 3px 9px; border-radius: 5px; font-weight: 600; }
.tag-deep { font-size: 11.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--accent-ink); border: 1px solid var(--steel); padding: 3px 9px; border-radius: 5px; font-weight: 600; }

.section-label { font-family: var(--sans); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin: 30px 0 8px; font-weight: 600; }

/* Entrada */
.entry p { margin: 0 0 16px; }
.entry .mirada { background: var(--mirada); border-left: 2px solid var(--mirada-rule); border-radius: 0 var(--radius) var(--radius) 0; padding: 22px 24px; margin: 26px 0; }
.entry .mirada .section-label { margin-top: 0; color: var(--accent-ink); }
.entry .mirada p:last-child { margin-bottom: 0; }
.entry .why { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 20px 0; margin: 26px 0; }
.entry .why .section-label { margin-top: 0; }
.entry .why p { font-size: 1.12rem; margin: 0; font-weight: 500; }
.entry-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 4px; }
.entry-tags span { font-family: var(--sans); font-size: 12px; color: var(--muted); background: var(--surface); border: 1px solid var(--line-strong); padding: 4px 10px; border-radius: 999px; }
.entry-citation { font-family: var(--sans); font-size: 13.5px; color: var(--muted); border-top: 1px solid var(--line-strong); margin-top: 30px; padding-top: 18px; display: grid; gap: 6px; }
.entry-citation b { color: var(--ink); font-weight: 600; }

/* Listado / tarjetas */
.entry-list { list-style: none; margin: 0; padding: 0; }
.entry-card { padding: 22px 0; border-bottom: 1px solid var(--line); }
.entry-card .cat, .entry-category { font-family: var(--sans); font-size: 11.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--accent-ink); margin: 0 0 6px; display: flex; gap: 8px; align-items: center; }
.entry-card .cat .lvl { color: var(--accent-ink); border: 1px solid var(--steel); border-radius: 4px; padding: 1px 6px; font-size: 10px; }
.entry-card h3 { font-size: 1.3rem; margin: 0 0 8px; line-height: 1.25; font-weight: 600; }
.entry-card h3 a { text-decoration: none; color: var(--ink); }
.entry-card h3 a:hover { color: var(--accent-ink); }
.entry-card .why { color: var(--muted); margin: 6px 0; font-size: .95rem; }
.entry-meta { font-family: var(--sans); font-size: 13px; color: var(--muted); display: flex; gap: 14px; flex-wrap: wrap; margin-top: 8px; }

/* Filtros y formularios */
.filters { display: flex; gap: 12px; flex-wrap: wrap; align-items: end; font-family: var(--sans); margin: 6px 0 20px; }
.filters label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.filters input, .filters select { font-family: var(--sans); font-size: 15px; padding: 8px 10px; border: 1px solid var(--line-strong); border-radius: 8px; background: var(--surface); color: var(--ink); }
.btn { font-family: var(--sans); font-size: 15px; font-weight: 500; cursor: pointer; background: var(--ink); color: var(--paper); border: none; border-radius: 8px; padding: 9px 16px; }
.btn:hover { background: var(--accent-ink); }
.pagination { display: flex; gap: 16px; justify-content: center; align-items: center; font-family: var(--sans); font-size: 15px; margin: 28px 0 0; }
.empty, .notice { color: var(--muted); font-family: var(--sans); }
.notice { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; }

@media (max-width: 560px) {
  body { font-size: 18px; }
  h1 { font-size: 1.7rem; }
  .site-main { padding: 24px 16px; }
}