/* ============================================================
   Fondear — layout.css
   Estructura: cabecera B (topbar + barra principal), pie F (con onda),
   contenedores y secciones.
   ============================================================ */

/* ---------- Contenedores ---------- */
.platcf-wrap { width: 100%; max-width: var(--platcf-maxw); margin-inline: auto; padding-inline: 22px; }
.platcf-wrap-narrow { max-width: 820px; }
.platcf-main { display: block; }

/* ---------- Secciones ---------- */
.platcf-section { padding: 60px 0; }
.platcf-section-alt { background: var(--platcf-accent-soft); }
.platcf-section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin-bottom: 28px; }
.platcf-section-head h2 { margin: 0; }
.platcf-section-link { font-weight: 600; font-size: 15px; color: var(--platcf-accent-dark); white-space: nowrap; }
.platcf-section-link:hover { color: var(--platcf-primary); }

/* ---------- Cabecera (variante B) ---------- */
.platcf-header { position: sticky; top: 0; z-index: 200; }
.platcf-topbar { background: var(--platcf-primary-dark); color: rgba(255,255,255,.82); font-size: 13px; }
.platcf-topbar-inner { max-width: var(--platcf-maxw); margin-inline: auto; padding: 8px 22px; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.platcf-topbar-note { color: rgba(255,255,255,.8); }
.platcf-topbar-link { color: var(--platcf-accent); font-weight: 600; }
.platcf-bar { background: var(--platcf-surface); border-bottom: 1px solid var(--platcf-border); }
.platcf-bar-inner { max-width: var(--platcf-maxw); margin-inline: auto; padding: 14px 22px; display: flex; align-items: center; gap: 26px; }
.platcf-brand { display: flex; align-items: center; }
.platcf-brand-text { display: inline-flex; align-items: center; gap: 10px; }
.platcf-brand-mark { width: 28px; height: 28px; border-radius: 8px; background: var(--platcf-gradient); flex: none; }
.platcf-brand-name { font-family: var(--platcf-font-head); font-size: 22px; font-weight: 700; color: var(--platcf-primary); }
.platcf-nav { display: flex; align-items: center; gap: 24px; margin-left: auto; }
.platcf-menu { list-style: none; display: flex; align-items: center; gap: 22px; margin: 0; padding: 0; }
.platcf-menu a { font-size: 15px; font-weight: 500; color: var(--platcf-text); }
.platcf-menu a:hover { color: var(--platcf-accent-dark); }

/* Desplegable de plataformas */
.platcf-nav-platforms { position: relative; }
.platcf-platforms-toggle { display: inline-flex; align-items: center; gap: 6px; background: none; border: 0; cursor: pointer; font: 500 15px/1 var(--platcf-font-body); color: var(--platcf-text); }
.platcf-caret { width: 7px; height: 7px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(45deg); margin-top: -3px; }
.platcf-platforms-panel { position: absolute; top: calc(100% + 14px); right: 0; min-width: 240px; background: var(--platcf-surface); border: 1px solid var(--platcf-border); border-radius: var(--platcf-radius); box-shadow: var(--platcf-shadow-lg); padding: 10px; opacity: 0; visibility: hidden; transform: translateY(-8px); transition: opacity .2s ease, transform .2s ease, visibility .2s ease; }
.platcf-nav-platforms:hover .platcf-platforms-panel, .platcf-nav-platforms:focus-within .platcf-platforms-panel { opacity: 1; visibility: visible; transform: translateY(0); }
.platcf-platforms-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.platcf-platforms-list a { display: block; padding: 8px 12px; border-radius: var(--platcf-radius-sm); font-size: 14.5px; color: var(--platcf-text); }
.platcf-platforms-list a:hover { background: var(--platcf-accent-soft); color: var(--platcf-primary); }

/* ---------- Pie (variante F: con onda) ---------- */
.platcf-footer { position: relative; background: var(--platcf-primary-dark); color: rgba(255,255,255,.8); margin-top: 80px; }
.platcf-footer-wave { position: absolute; top: -1px; left: 0; right: 0; line-height: 0; transform: translateY(-100%); }
.platcf-footer-wave svg { width: 100%; height: 70px; display: block; }
.platcf-footer-body { max-width: var(--platcf-maxw); margin-inline: auto; padding: 40px 22px; }
.platcf-footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 36px; }
.platcf-footer-col h4 { color: #fff; margin: 0 0 14px; font-size: 16px; font-family: var(--platcf-font-head); }
.platcf-footer-mission p { font-size: 14.5px; color: rgba(255,255,255,.78); }
.platcf-footer-llms { color: var(--platcf-accent); font-size: 13.5px; font-weight: 600; }
.platcf-footer-menu { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.platcf-footer-menu a { color: rgba(255,255,255,.76); font-size: 14.5px; }
.platcf-footer-menu a:hover { color: var(--platcf-accent); }
.platcf-footer-risk { font-size: 12.5px; color: rgba(255,255,255,.55); margin: 30px 0 0; max-width: 90ch; }
.platcf-footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 24px; padding-top: 18px; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; font-size: 13px; color: rgba(255,255,255,.6); }
.platcf-footer-bottom a { color: rgba(255,255,255,.6); }