/* ============================================================
   Flow AI — Guías gratuitas.
   Hereda los tokens de styles.css. Solo agrega lo propio de la
   biblioteca y de la plantilla de guía.
   ============================================================ */

/* ---------- Cabecera de la biblioteca ---------- */
.lib-hero { position: relative; overflow: hidden; padding: 92px 0 48px; text-align: center; }
.lib-hero .container > * { margin-left: auto; margin-right: auto; }
.lib-hero h1 { font-size: clamp(46px, 8vw, 88px); line-height: 1.02; letter-spacing: -.04em; font-weight: 800; margin-bottom: 22px; max-width: 15ch; }
.lib-hero .lead { color: var(--ink-soft); font-size: clamp(17px, 2vw, 20px); max-width: 640px; }
.lib-count { color: var(--ink-mut); font-size: 14px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; margin-top: 26px; }

/* ---------- Filtros ---------- */
.filters { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 22px 0; margin-bottom: 40px; background: var(--bg-2); }
.filter-row { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }
.filter-row + .filter-row { margin-top: 16px; }
.chips { justify-content: center; }
.filter-label { font-size: 12px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--ink-mut); min-width: 96px; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  font-family: inherit; font-size: 14px; font-weight: 500; cursor: pointer;
  padding: 7px 15px; border-radius: 999px; min-height: 36px;
  background: var(--surface); border: 1px solid var(--line); color: var(--ink-soft);
  transition: background .2s, border-color .2s, color .2s;
}
.chip:hover { border-color: var(--line-strong); color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--blue-3); border-color: var(--blue-2); color: #fff; }

.filter-search {
  font-family: inherit; font-size: 15px; color: var(--ink);
  width: 100%; max-width: 460px; min-height: 40px; padding: 9px 16px;
  border-radius: 999px; background: var(--surface); border: 1px solid var(--line);
  transition: border-color .2s;
}
.filter-search::placeholder { color: var(--ink-mut); }
.filter-search:focus { outline: none; border-color: var(--blue-2); }
.filter-search::-webkit-search-cancel-button { cursor: pointer; }

/* ---------- Rejilla de guías ---------- */
.guide-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.guide-card {
  display: flex; flex-direction: column; gap: 10px;
  padding: 26px 24px 22px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line);
  transition: transform .2s ease, border-color .2s, background .2s;
}
.guide-card:hover { transform: translateY(-3px); border-color: var(--blue-2); background: var(--surface-2); }
.guide-badge { align-self: flex-start; font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--blue-bright); }
.guide-card h3 { font-size: 19px; }
.guide-card p { color: var(--ink-soft); font-size: 15px; flex: 1; }
.guide-meta { color: var(--ink-mut); font-size: 13px; font-weight: 500; }
.guide-go { color: var(--blue-2); font-weight: 600; font-size: 15px; margin-top: 4px; }
.guide-empty { grid-column: 1 / -1; text-align: center; color: var(--ink-mut); padding: 60px 0; }

/* ---------- Captura de correo ---------- */
.optin { margin: 72px 0 0; padding: 44px 32px; border-radius: var(--radius); background: var(--bg-3); border: 1px solid var(--line-strong); text-align: center; }
.optin h2 { font-size: clamp(24px, 3.4vw, 32px); margin-bottom: 12px; }
.optin p { color: var(--ink-soft); max-width: 520px; margin: 0 auto 24px; }
.optin-form { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; max-width: 520px; margin: 0 auto; }
.optin-form input {
  flex: 1 1 260px; min-height: 48px; padding: 12px 18px; font-family: inherit; font-size: 16px;
  border-radius: 999px; border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink);
}
.optin-form input::placeholder { color: var(--ink-mut); }
.optin-form input:focus { border-color: var(--blue-2); outline: none; }
/* styles.css deja el padding a .btn-sm/.btn-lg; este botón necesita el suyo. */
.optin-form .btn { padding: 13px 26px; font-size: 15.5px; min-height: 48px; flex: 0 0 auto; }
.optin-form .btn[disabled] { opacity: .6; cursor: progress; transform: none; }
.optin-note { font-size: 13.5px; color: var(--ink-mut); margin-top: 16px; }
.optin-msg { margin-top: 16px; font-weight: 600; color: var(--blue-bright); min-height: 22px; }

/* ---------- Plantilla de guía ---------- */
.guide-head { position: relative; overflow: hidden; padding: 84px 0 46px; border-bottom: 1px solid var(--line); text-align: center; }
.guide-head .container > * { margin-left: auto; margin-right: auto; }
.crumb { font-size: 14px; color: var(--ink-mut); font-weight: 500; margin-bottom: 24px; }
.crumb a { color: var(--blue-2); }
.guide-head h1 {
  font-size: clamp(40px, 7vw, 82px); line-height: 1.02; letter-spacing: -.042em; font-weight: 800;
  margin-bottom: 22px; max-width: 17ch;
}
.guide-head .lead { color: var(--ink-soft); font-size: clamp(17px, 2vw, 20px); max-width: 660px; }
.guide-tags { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-bottom: 20px; }
.tag { font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--blue-bright); background: rgba(59,130,246,.12); border: 1px solid rgba(96,165,250,.28); padding: 5px 11px; border-radius: 999px; }
.byline { color: var(--ink-mut); font-size: 14.5px; margin-top: 26px; }

/* La columna de lectura va centrada en la página; el texto adentro, alineado a la izquierda. */
.prose { max-width: 760px; margin: 0 auto; padding: 48px 0 20px; font-size: 17px; }
.prose > * + * { margin-top: 20px; }
.prose h2 { font-size: clamp(24px, 3.2vw, 31px); margin-top: 52px; padding-top: 4px; }
.prose h3 { font-size: 20px; margin-top: 36px; color: var(--ink); }
.prose p, .prose li { color: var(--ink-soft); }
.prose ul, .prose ol { padding-left: 22px; }
.prose li + li { margin-top: 9px; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose a { color: var(--blue-2); text-decoration: underline; text-underline-offset: 3px; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 44px 0; }

.plugin-card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 24px 24px 20px; }
.plugin-card + .plugin-card { margin-top: 16px; }
.plugin-card h3 { margin-top: 0; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.plugin-card h3 code { font-size: 15px; }
.plugin-for { font-size: 14px; color: var(--ink-mut); margin-top: 10px; }
.plugin-for strong { color: var(--ink-soft); }

.callout-box { border-left: 3px solid var(--blue-2); background: var(--bg-3); padding: 20px 24px; border-radius: 0 var(--radius) var(--radius) 0; }
.callout-box p { color: var(--ink-soft); }

code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em; background: rgba(255,255,255,.07); padding: 2px 7px; border-radius: 5px; color: var(--blue-bright); }
pre { background: var(--bg-3); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; overflow-x: auto; }
pre code { background: none; padding: 0; color: var(--ink); font-size: 14.5px; line-height: 1.7; }

.stack { margin: 56px 0 0; padding-top: 32px; border-top: 1px solid var(--line); }
.stack h4 { font-size: 13px; letter-spacing: .09em; text-transform: uppercase; color: var(--ink-mut); margin-bottom: 16px; }
.stack-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.stack-link { padding: 18px 20px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); transition: border-color .2s, transform .2s; }
.stack-link:hover { border-color: var(--blue-2); transform: translateY(-2px); }
.stack-link span { display: block; color: var(--blue-2); font-weight: 600; font-size: 15.5px; }
.stack-link small { color: var(--ink-mut); font-size: 13.5px; }

@media (max-width: 900px) {
  .guide-grid { grid-template-columns: repeat(2, 1fr); }
  .stack-links { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .guide-grid { grid-template-columns: 1fr; }
  .filter-label { min-width: 100%; }
  .prose { font-size: 16.5px; }
}
@media (prefers-reduced-motion: reduce) {
  .guide-card:hover, .stack-link:hover { transform: none; }
}

/* ============================================================
   CTA al Reto 30 Días.
   Aparece al final de cada guía, justo donde se acabó de leer.
   ============================================================ */
.cta-reto {
  margin: 56px 0 8px;
  padding: 34px 32px 30px;
  border: 1px solid rgba(96, 165, 250, .38);
  border-radius: var(--radius);
  background: linear-gradient(155deg, rgba(59, 130, 246, .14), rgba(59, 130, 246, .03));
  box-shadow: var(--glow-blue);
}
.cta-reto-ojo {
  font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--blue-bright); margin: 0 0 12px;
}
.cta-reto h3 {
  font-size: clamp(21px, 2.9vw, 27px); line-height: 1.18; margin: 0 0 12px; max-width: 26ch;
}
.cta-reto-sub { font-size: 15.5px; line-height: 1.65; color: var(--ink-soft); margin: 0 0 24px; max-width: 62ch; }
.cta-reto-fila { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.cta-reto-nota { font-size: 13px; color: var(--ink-mut); }

/* Dentro de .prose los márgenes de tipografía no aplican al bloque. */
.prose .cta-reto h3 { color: var(--ink); }
.prose .cta-reto p { margin: 0 0 12px; }
.prose .cta-reto p.cta-reto-sub { margin: 0 0 24px; }

/* ---------- Banda del reto en el índice ---------- */
.reto-banda {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 20px; margin: 0 0 34px;
  padding: 22px 26px;
  border: 1px solid rgba(96, 165, 250, .32);
  border-radius: var(--radius);
  background: linear-gradient(100deg, rgba(59, 130, 246, .13), rgba(59, 130, 246, .02));
}
.reto-banda-txt { max-width: 62ch; }
.reto-banda-txt b { display: block; font-size: 17.5px; letter-spacing: -.02em; margin-bottom: 5px; }
.reto-banda-txt span { font-size: 14.5px; color: var(--ink-soft); line-height: 1.6; }