/* =====================================================================
   SEI — Soporte e Implementación · Hoja de estilos del portal
   Sin dependencias externas (compatible con CSP estricta y uso offline).
   Paleta corporativa: azul institucional + turquesa técnico.
   ===================================================================== */

/* ---------- 1. Tokens ---------- */
:root {
  color-scheme: light dark;

  --sei-900: #082238;
  --sei-800: #0B3153;
  --sei-700: #0E4C81;
  --sei-600: #106E9E;
  --sei-500: #1487BC;
  --sei-400: #3FA9D4;
  --teal-600: #0E8C8C;
  --teal-500: #12A5A5;

  --ok: #1A8A4B;
  --warn: #B26A00;
  --err: #B3261E;

  --bg: #F5F7FA;
  --bg-elev: #FFFFFF;
  --bg-alt: #ECF1F6;
  --fg: #10202E;
  --fg-muted: #4A5C6B;
  --border: #D6DFE8;
  --ring: #106E9E;
  --link: #0E4C81;
  --shadow: 0 1px 2px rgba(8, 34, 56, .06), 0 8px 24px rgba(8, 34, 56, .07);
  --shadow-hover: 0 2px 4px rgba(8, 34, 56, .08), 0 14px 34px rgba(8, 34, 56, .13);

  --radius: 14px;
  --radius-sm: 9px;
  --wrap: 1140px;
  --font: "Segoe UI", Inter, system-ui, -apple-system, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

/* Paleta oscura: se aplica por preferencia del sistema salvo que el usuario
   haya fijado el tema claro, y por elección explícita [data-tema="oscuro"]. */
@media (prefers-color-scheme: dark) {
  :root:not([data-tema="claro"]) {
    --bg: #071522;
    --bg-elev: #0E2437;
    --bg-alt: #0A1C2B;
    --fg: #E8F0F7;
    --fg-muted: #9DB2C4;
    --border: #1D3A52;
    --ring: #4FBBE0;
    --link: #3FA9D4;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35);
    --shadow-hover: 0 2px 6px rgba(0, 0, 0, .45), 0 14px 34px rgba(0, 0, 0, .5);
  }
}
:root[data-tema="oscuro"] {
  --bg: #071522;
  --bg-elev: #0E2437;
  --bg-alt: #0A1C2B;
  --fg: #E8F0F7;
  --fg-muted: #9DB2C4;
  --border: #1D3A52;
  --ring: #4FBBE0;
  --link: #3FA9D4;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35);
  --shadow-hover: 0 2px 6px rgba(0, 0, 0, .45), 0 14px 34px rgba(0, 0, 0, .5);
}

/* ---------- 2. Reset ligero ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; }
a { color: var(--link); }
h1, h2, h3 { line-height: 1.2; letter-spacing: -.015em; margin: 0 0 .4em; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; }

:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 3px;
  border-radius: 6px;
}

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: clamp(16px, 4vw, 28px); }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--sei-700); color: #fff; padding: 12px 18px;
  border-radius: 0 0 var(--radius-sm) 0; font-weight: 600; text-decoration: none;
}
.skip-link:focus { left: 0; }

/* ---------- 3. Barra superior ---------- */
.topbar {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg-elev) 88%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar__inner { display: flex; align-items: center; gap: 20px; min-height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: inherit; margin-right: auto; }
.brand__mark { border-radius: 10px; flex: none; }
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name { font-size: 1.22rem; font-weight: 700; letter-spacing: .13em; }
.brand__tag { font-size: .70rem; letter-spacing: .10em; text-transform: uppercase; color: var(--fg-muted); }

.nav { display: flex; gap: 6px; }
.nav a {
  color: var(--fg-muted); text-decoration: none; font-size: .93rem; font-weight: 500;
  padding: 8px 12px; border-radius: 8px;
}
.nav a:hover { color: var(--fg); background: var(--bg-alt); }
@media (max-width: 720px) { .nav { display: none; } }

.btn-icon {
  display: inline-grid; place-items: center; width: 40px; height: 40px;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg-elev); color: var(--fg-muted); cursor: pointer;
}
.btn-icon:hover { color: var(--fg); border-color: var(--sei-500); }
.ico-moon { display: none; }
:root[data-tema="oscuro"] .ico-sun { display: none; }
:root[data-tema="oscuro"] .ico-moon { display: inline; }
@media (prefers-color-scheme: dark) {
  :root:not([data-tema="claro"]) .ico-sun { display: none; }
  :root:not([data-tema="claro"]) .ico-moon { display: inline; }
}

/* ---------- 4. Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(900px 420px at 12% -10%, color-mix(in srgb, var(--teal-500) 22%, transparent), transparent 62%),
    linear-gradient(140deg, var(--sei-900) 0%, var(--sei-800) 45%, var(--sei-700) 100%);
  color: #EAF3FA;
  border-bottom: 1px solid var(--border);
}
.hero__inner { padding: clamp(48px, 8vw, 84px) 0 clamp(44px, 7vw, 72px); max-width: 780px; }
.eyebrow {
  display: inline-block; margin: 0 0 14px;
  font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; font-weight: 600;
  color: #9FE0E0; border: 1px solid rgba(159, 224, 224, .35);
  padding: 5px 12px; border-radius: 999px;
}
.hero h1 { font-size: clamp(1.85rem, 4.2vw, 2.85rem); font-weight: 700; color: #FFFFFF; }
.hero__lead { font-size: clamp(1rem, 1.6vw, 1.13rem); color: #C6DCEC; max-width: 66ch; }
.hero__lead strong { color: #FFFFFF; font-weight: 600; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 10px;
  font-weight: 600; font-size: .96rem; text-decoration: none;
  transition: transform .15s ease, background-color .15s ease, border-color .15s ease;
}
.btn--primary { background: var(--teal-500); color: #04222A; }
.btn--primary:hover { background: #35C3C3; transform: translateY(-1px); }
.btn--ghost { border: 1px solid rgba(255,255,255,.4); color: #EAF3FA; }
.btn--ghost:hover { background: rgba(255,255,255,.1); transform: translateY(-1px); }

/* ---------- 5. Secciones ---------- */
.section { padding: clamp(44px, 6vw, 72px) 0; }
.section--alt { background: var(--bg-alt); border-block: 1px solid var(--border); }
.section__head { max-width: 68ch; margin-bottom: 30px; }
.section__head h2 { font-size: clamp(1.35rem, 2.6vw, 1.75rem); }
.section__sub { color: var(--fg-muted); margin: 0; }

/* ---------- 6. Tarjetas de plataforma ---------- */
.grid {
  list-style: none; display: grid; gap: 22px;
  grid-template-columns: repeat(auto-fit, minmax(285px, 1fr));
}
.grid--compact { gap: 16px; }

.card {
  height: 100%; display: flex; flex-direction: column;
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  position: relative;
}
.card::before {
  content: ""; position: absolute; inset: 0 0 auto; height: 4px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: linear-gradient(90deg, var(--sei-700), var(--teal-500));
}
.card--sentinel::before { background: linear-gradient(90deg, var(--teal-600), #4FC3A1); }
.card--terravox::before { background: linear-gradient(90deg, var(--sei-800), var(--sei-400)); }
.card:hover, .card:focus-within { transform: translateY(-3px); box-shadow: var(--shadow-hover); border-color: var(--sei-500); }

.card__top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.card__icon {
  display: inline-grid; place-items: center; width: 48px; height: 48px; border-radius: 12px;
  background: color-mix(in srgb, var(--sei-600) 12%, transparent);
  color: var(--sei-600);
}
.card--sentinel .card__icon { background: color-mix(in srgb, var(--teal-600) 14%, transparent); color: var(--teal-600); }
.card__title { font-size: 1.25rem; margin-bottom: .3em; }
.card__desc { color: var(--fg-muted); font-size: .95rem; flex: 1; }
.card__cta {
  display: inline-flex; align-items: center; gap: 8px; align-self: flex-start;
  margin-top: 8px; padding: 11px 18px; border-radius: 10px;
  background: var(--sei-700); color: #fff; text-decoration: none; font-weight: 600; font-size: .93rem;
}
.card__cta:hover { background: var(--sei-600); }
.card__cta svg { transition: transform .15s ease; }
.card__cta:hover svg { transform: translateX(3px); }

/* Indicador de estado */
.estado { display: inline-flex; align-items: center; gap: 7px; font-size: .76rem; color: var(--fg-muted); }
.estado__dot { width: 9px; height: 9px; border-radius: 50%; background: var(--fg-muted); flex: none; }
.estado[data-nivel="ok"] .estado__dot { background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 20%, transparent); }
.estado[data-nivel="degradado"] .estado__dot { background: var(--warn); box-shadow: 0 0 0 3px color-mix(in srgb, var(--warn) 20%, transparent); }
.estado[data-nivel="caido"] .estado__dot { background: var(--err); box-shadow: 0 0 0 3px color-mix(in srgb, var(--err) 20%, transparent); }
.estado[data-nivel="ok"] .estado__txt { color: var(--ok); }
.estado[data-nivel="degradado"] .estado__txt { color: var(--warn); }
.estado[data-nivel="caido"] .estado__txt { color: var(--err); }

.nota { margin-top: 22px; font-size: .82rem; color: var(--fg-muted); }

/* ---------- 7. Mesa de ayuda y reglas ---------- */
.mini {
  list-style: none; background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 20px;
}
.mini__t { font-size: .78rem; text-transform: uppercase; letter-spacing: .09em; color: var(--fg-muted); font-weight: 600; }
.mini p { margin: 0 0 4px; font-weight: 600; }
.mini__d { font-weight: 400 !important; font-size: .85rem; color: var(--fg-muted); }

.reglas { list-style: none; display: grid; gap: 12px; max-width: 80ch; }
.reglas li {
  position: relative; padding: 14px 18px 14px 46px;
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: .95rem;
}
.reglas li::before {
  content: ""; position: absolute; left: 18px; top: 20px;
  width: 10px; height: 10px; border-radius: 3px;
  background: linear-gradient(135deg, var(--sei-600), var(--teal-500));
}

/* ---------- 8. Pie ---------- */
.footer { background: var(--sei-900); color: #B7CCDD; padding: 34px 0; }
.footer__inner { display: grid; gap: 10px; }
.footer__brand { display: flex; align-items: center; gap: 10px; color: #EAF3FA; margin: 0; }
.footer__brand img { border-radius: 8px; }
.footer__legal { margin: 0; font-size: .85rem; max-width: 74ch; }
.footer__meta { margin: 0; font-size: .8rem; color: #7E98AD; }

/* ---------- 9. Impresión ---------- */
@media print {
  .topbar, .hero__actions, .btn-icon { display: none !important; }
  body { background: #fff; color: #000; }
  .card, .mini, .reglas li { box-shadow: none; border-color: #999; }
  .card__cta::after { content: " (" attr(href) ")"; font-weight: 400; }
}

/* ---------- 10. Ajustes de contraste en tema oscuro ---------- */
@media (prefers-color-scheme: dark) {
  :root:not([data-tema="claro"]) .card__cta { background: var(--sei-600); color: #FFFFFF; }
  :root:not([data-tema="claro"]) .card__cta:hover { background: var(--sei-500); }
  :root:not([data-tema="claro"]) .card__icon { color: var(--sei-400); }
  :root:not([data-tema="claro"]) .card--sentinel .card__icon { color: #35C3C3; }
  :root:not([data-tema="claro"]) { --ok: #3FBF77; --warn: #E0A030; --err: #F0736A; }
  :root:not([data-tema="claro"]) .hero { border-bottom-color: #0A2033; }
}
:root[data-tema="oscuro"] .card__cta { background: var(--sei-600); color: #FFFFFF; }
:root[data-tema="oscuro"] .card__cta:hover { background: var(--sei-500); }
:root[data-tema="oscuro"] .card__icon { color: var(--sei-400); }
:root[data-tema="oscuro"] .card--sentinel .card__icon { color: #35C3C3; }
:root[data-tema="oscuro"] { --ok: #3FBF77; --warn: #E0A030; --err: #F0736A; }