/* METT · Sistema de diseño (claro/oscuro, responsive) */
:root {
  --primary: #4f46e5; --primary-hover: #4338ca; --primary-soft: #eef2ff;
  --bg: #f4f5fb; --surface: #ffffff; --surface-2: #f9fafb;
  --text: #111827; --text-2: #6b7280; --border: #e5e7eb;
  --success: #059669; --success-soft: #ecfdf5;
  --danger: #dc2626; --danger-soft: #fef2f2;
  --warning: #d97706; --warning-soft: #fffbeb;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.05);
  --radius: 12px;
}
[data-theme="dark"] {
  --primary: #6366f1; --primary-hover: #818cf8; --primary-soft: #1e1b4b;
  --bg: #0f1117; --surface: #171a23; --surface-2: #1f2330;
  --text: #e5e7eb; --text-2: #9ca3af; --border: #2a2f3e;
  --success: #34d399; --success-soft: #052e21;
  --danger: #f87171; --danger-soft: #3b0d0d;
  --warning: #fbbf24; --warning-soft: #3a2a05;
  --shadow: 0 1px 3px rgba(0,0,0,.4), 0 4px 12px rgba(0,0,0,.3);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.55; min-height: 100vh;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

/* ---------- Layout con barra lateral ---------- */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 250px; flex-shrink: 0; background: var(--surface); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.sidebar .brand {
  display: flex; align-items: center; gap: 10px; padding: 20px 18px; font-size: 1.3rem;
  font-weight: 800; color: var(--text); letter-spacing: .5px;
}
.sidebar .brand .logo {
  background: linear-gradient(135deg, var(--primary), #9333ea); color: #fff; width: 38px; height: 38px;
  display: grid; place-items: center; border-radius: 10px; font-size: 1rem;
}
/* Logo (dos versiones: negra en tema claro, blanca en tema oscuro) */
.brand-logo { height: 36px; width: auto; display: block; }
.brand .logo-dark { display: none; }
[data-theme="dark"] .brand .logo-light { display: none; }
[data-theme="dark"] .brand .logo-dark { display: block; }
.sidebar nav { flex: 1; padding: 8px; }
.sidebar nav a {
  display: flex; align-items: center; gap: 12px; padding: 11px 14px; border-radius: 10px;
  color: var(--text-2); font-weight: 500; margin-bottom: 2px;
}
.sidebar nav a .bi { width: 1.25em; text-align: center; font-size: 1.05rem; flex-shrink: 0; }
.sidebar nav a:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.sidebar nav a.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.sidebar nav .nav-title { font-size: .72rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text-2); padding: 16px 14px 6px; }
.sidebar .sidebar-footer { padding: 14px; border-top: 1px solid var(--border); }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  display: flex; align-items: center; gap: 14px; padding: 14px 26px;
  background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 40;
}
.topbar .search-form { flex: 1; max-width: 420px; }
.content { padding: 26px; max-width: 1200px; width: 100%; margin: 0 auto; }

.menu-toggle { display: none; }
@media (max-width: 900px) {
  .sidebar { position: fixed; z-index: 60; left: -260px; transition: left .25s; height: 100vh; }
  .sidebar.open { left: 0; box-shadow: var(--shadow); }
  .menu-toggle { display: inline-flex; }
  .content { padding: 16px; }
  .topbar { padding: 12px 16px; }
}

/* ---------- Componentes ---------- */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; }
.card + .card { margin-top: 18px; }
.card h2, .card h3 { margin-bottom: 14px; }

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.grid-stats { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }

.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.stat .stat-value { font-size: 1.7rem; font-weight: 800; }
.stat .stat-label { color: var(--text-2); font-size: .85rem; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; cursor: pointer;
  padding: 10px 18px; border-radius: 10px; border: 1px solid transparent; font-size: .95rem;
  font-weight: 600; background: var(--primary); color: #fff; transition: background .15s;
}
.btn:hover { background: var(--primary-hover); text-decoration: none; }
.btn-secondary { background: var(--surface-2); color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: 6px 12px; font-size: .85rem; border-radius: 8px; }
.btn-block { width: 100%; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; font-size: .92rem; }
.form-control, input[type="text"], input[type="email"], input[type="password"], input[type="number"], input[type="url"], select, textarea {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--text); font-size: .95rem; font-family: inherit;
}
.form-control:focus, input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent);
}
textarea { min-height: 110px; resize: vertical; }
.field-error { color: var(--danger); font-size: .85rem; margin-top: 4px; }
.form-check { display: flex; align-items: center; gap: 8px; }
.form-check input { width: auto; }
.form-hint { color: var(--text-2); font-size: .82rem; margin-top: 5px; display: flex; align-items: center; gap: 5px; }

/* Secciones dentro de un formulario largo */
.form-section { border-top: 1px solid var(--border); margin-top: 22px; padding-top: 20px; }
.form-section:first-of-type { border-top: 0; margin-top: 0; padding-top: 0; }
.form-section-title {
  display: flex; align-items: center; gap: 8px; font-size: .78rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .6px; color: var(--text-2); margin-bottom: 16px;
}
.form-section-title .bi { color: var(--primary); font-size: 1.05rem; }
.form-grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.form-actions { display: flex; gap: 10px; align-items: center; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); }

/* Bloque de fecha + hora */
.datetime-box { display: flex; gap: 12px; flex-wrap: wrap; }
.dt-field {
  display: flex; align-items: center; gap: 8px; flex: 1; min-width: 170px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 0 12px;
  transition: border-color .15s, box-shadow .15s;
}
.dt-field:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent); }
.dt-field .bi { color: var(--primary); font-size: 1.05rem; flex-shrink: 0; }
.dt-field input { border: 0; background: transparent; padding: 10px 0; width: 100%; }
.dt-field input:focus { outline: none; box-shadow: none; }

.alert { padding: 12px 16px; border-radius: 10px; margin-bottom: 16px; font-size: .95rem; }
.alert-success { background: var(--success-soft); color: var(--success); border: 1px solid var(--success); }
.alert-error { background: var(--danger-soft); color: var(--danger); border: 1px solid var(--danger); }

.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: .75rem; font-weight: 700; }
.badge-primary { background: var(--primary-soft); color: var(--primary); }
.badge-success { background: var(--success-soft); color: var(--success); }
.badge-warning { background: var(--warning-soft); color: var(--warning); }
.badge-muted { background: var(--surface-2); color: var(--text-2); }

.table-wrap { overflow-x: auto; }
table.table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.table th { text-align: left; padding: 10px 12px; color: var(--text-2); font-size: .78rem; text-transform: uppercase; letter-spacing: .6px; border-bottom: 2px solid var(--border); }
.table td { padding: 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table tr:hover td { background: var(--surface-2); }

.progress-bar { background: var(--surface-2); border-radius: 999px; height: 9px; overflow: hidden; border: 1px solid var(--border); }
.progress-bar > div { background: linear-gradient(90deg, var(--primary), #9333ea); height: 100%; border-radius: 999px; transition: width .4s; }

/* ---------- Filtro desplegable (portada) ---------- */
.filter-row { position: relative; margin-top: 18px; }
.filter-row .filter-corner { position: absolute; right: 0; top: 50%; transform: translateY(-50%); z-index: 50; }
@media (max-width: 640px) {
  .filter-row .filter-corner { position: static; transform: none; display: flex; justify-content: center; margin-top: 10px; }
}
.filter-dropdown { position: relative; }
.filter-dropdown summary { list-style: none; cursor: pointer; }
.filter-dropdown summary::-webkit-details-marker { display: none; }
.filter-dropdown .menu {
  position: absolute; right: 0; top: calc(100% + 6px); min-width: 180px; padding: 6px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); z-index: 30; display: flex; flex-direction: column; gap: 2px; text-align: left;
}
.filter-dropdown .menu a { padding: 8px 12px; border-radius: 8px; color: var(--text); display: flex; align-items: center; gap: 8px; }
.filter-dropdown .menu a:hover { background: var(--surface-2); text-decoration: none; }
.filter-dropdown .menu a.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }

/* ---------- Tarjetas de curso ---------- */
.course-card { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column; transition: transform .15s; }
.course-card:hover { transform: translateY(-3px); }

/* Listón "Próximamente" en la esquina superior izquierda */
.card-ribbon { position: absolute; top: 0; left: 0; width: 140px; height: 140px; overflow: hidden; z-index: 3; pointer-events: none; }
.card-ribbon span {
  position: absolute; left: -52px; top: 28px; width: 200px; padding: 6px 0; text-align: center;
  transform: rotate(-45deg);
  background-image: linear-gradient(45deg, var(--primary) 0%, #9333ea 51%, var(--primary) 100%);
  color: #fff; font-weight: 700; font-size: .66rem; letter-spacing: .08em; text-transform: uppercase;
  box-shadow: 0 5px 10px rgba(0,0,0,.23);
}
/* La portada se muestra COMPLETA (sin recortar): caja 16:9 con la imagen "contain" */
.course-card .cover { aspect-ratio: 16 / 9; width: 100%; background: linear-gradient(135deg, var(--primary), #9333ea); position: relative; display: grid; place-items: center; overflow: hidden; }
.course-card .cover img { width: 100%; height: 100%; object-fit: contain; }
.course-card .body { padding: 16px; flex: 1; display: flex; flex-direction: column; gap: 8px; }
.course-card .title { font-weight: 700; font-size: 1.02rem; }
.course-card .meta { color: var(--text-2); font-size: .85rem; }
.course-card .footer { margin-top: auto; padding-top: 10px; }

/* ---------- Reproductor ---------- */
.player-layout { display: grid; grid-template-columns: 1fr 340px; gap: 20px; align-items: start; }
@media (max-width: 1100px) { .player-layout { grid-template-columns: 1fr; } }
.video-frame { background: #000; border-radius: var(--radius); overflow: hidden; }
.video-frame video { width: 100%; display: block; max-height: 70vh; }
.player-controls-extra { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding: 10px 0; }

.outline { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.outline .module-head { padding: 12px 16px; font-weight: 700; background: var(--surface-2); border-bottom: 1px solid var(--border); font-size: .92rem; }
.outline a.lesson-item { display: flex; align-items: center; gap: 10px; padding: 11px 16px; border-bottom: 1px solid var(--border); color: var(--text); font-size: .92rem; }
.outline a.lesson-item:hover { background: var(--surface-2); text-decoration: none; }
.outline a.lesson-item.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.outline .check { width: 19px; height: 19px; border-radius: 50%; border: 2px solid var(--border); flex-shrink: 0; display: grid; place-items: center; font-size: .7rem; }
.outline .check.done { background: var(--success); border-color: var(--success); color: #fff; }

/* ---------- Certificado ---------- */
.certificate { max-width: 850px; margin: 30px auto; background: var(--surface); border: 10px double var(--primary); border-radius: 6px; padding: 50px 60px; text-align: center; }
.certificate h1 { font-size: 2rem; color: var(--primary); letter-spacing: 2px; }
.certificate .student-name { font-size: 2.2rem; font-weight: 800; margin: 18px 0; }
.certificate .cert-footer { display: flex; justify-content: space-between; align-items: flex-end; margin-top: 44px; gap: 20px; }
@media print {
  body * { visibility: hidden; }
  .certificate, .certificate * { visibility: visible; }
  .certificate { position: absolute; inset: 0; margin: 0; border-color: #4f46e5 !important; }
  .no-print { display: none !important; }
}

/* ---------- Auth ---------- */
.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: 20px; background: linear-gradient(135deg, var(--bg) 60%, var(--primary-soft)); }
.auth-card { width: 100%; max-width: 420px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow); padding: 34px; }
.auth-card .brand { text-align: center; margin-bottom: 22px; }
.auth-card .brand .logo { display: inline-grid; place-items: center; width: 52px; height: 52px; border-radius: 14px; background: linear-gradient(135deg, var(--primary), #9333ea); color: #fff; font-weight: 800; font-size: 1.2rem; margin-bottom: 8px; }

/* ---------- Utilidades ---------- */
.flex { display: flex; } .items-center { align-items: center; } .justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; } .gap-4 { gap: 16px; } .flex-wrap { flex-wrap: wrap; }
.mt-2 { margin-top: 8px; } .mt-4 { margin-top: 16px; } .mb-2 { margin-bottom: 8px; } .mb-4 { margin-bottom: 16px; }
.text-muted { color: var(--text-2); } .text-sm { font-size: .87rem; } .text-center { text-align: center; }
.page-title { font-size: 1.5rem; font-weight: 800; margin-bottom: 4px; }
.page-sub { color: var(--text-2); margin-bottom: 22px; }
.icon-btn { background: none; border: 1px solid var(--border); border-radius: 10px; width: 38px; height: 38px; display: inline-flex; align-items: center; justify-content: center; cursor: pointer; color: var(--text); font-size: 1.05rem; position: relative; }
.icon-btn:hover { background: var(--surface-2); }
.notif-dot { position: absolute; top: 6px; right: 7px; width: 9px; height: 9px; border-radius: 50%; background: var(--danger); }
.empty { text-align: center; color: var(--text-2); padding: 46px 16px; }
.empty .empty-icon { font-size: 2.4rem; margin-bottom: 8px; }

/* ---------- Avatares e instructores ---------- */
.avatar {
  width: 44px; height: 44px; border-radius: 50%; object-fit: cover;
  border: 2px solid var(--surface); box-shadow: 0 0 0 1px var(--border); display: inline-block; vertical-align: middle;
}
.avatar-sm { width: 30px; height: 30px; }
.avatar-placeholder {
  display: inline-grid; place-items: center; background: linear-gradient(135deg, var(--primary), #9333ea);
  color: #fff; font-weight: 700; font-size: .9rem;
}
.avatar-sm.avatar-placeholder { font-size: .75rem; }

.instructor-list { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.instructor-chip { display: inline-flex; align-items: center; gap: 8px; }
/* Cuadrícula pareja de instructores (detalle del curso) */
.instructor-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px 28px; margin: 12px 0 6px; }
.instructor-grid .instructor-chip { align-items: center; }

.instructor-picker { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 12px; margin-top: 4px; }
.instructor-option {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px; border: 1px solid var(--border);
  border-radius: 10px; cursor: pointer; background: var(--surface); transition: border-color .15s, background .15s;
}
.instructor-option:hover { background: var(--surface-2); }
.instructor-option.selected { border-color: var(--primary); background: var(--primary-soft); box-shadow: 0 0 0 1px var(--primary); }
.instructor-option input { width: auto; flex-shrink: 0; }
.instructor-option input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--primary); cursor: pointer; }
.instructor-option .avatar { flex-shrink: 0; }
.instructor-option .ins-text { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 1px; }
.instructor-option .ins-name { font-weight: 700; font-size: .9rem; line-height: 1.25; }
.instructor-option .ins-role { font-size: .8rem; color: var(--text-2); line-height: 1.3; }
.instructor-option .ins-order { width: 48px; text-align: center; padding: 8px 4px; flex-shrink: 0; }

/* ---------- Página de curso: contenido + widget lateral ---------- */
.course-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 22px; align-items: start; }
.course-side { position: sticky; top: 20px; }
@media (max-width: 900px) { .course-layout { grid-template-columns: 1fr; } .course-side { position: static; } }
.course-widget-list { display: flex; flex-direction: column; gap: 8px; }
.course-widget-item {
  display: flex; gap: 11px; align-items: center; padding: 8px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface); transition: border-color .15s, background .15s;
}
.course-widget-item:hover { background: var(--surface-2); border-color: var(--primary); text-decoration: none; }
.cwi-thumb {
  width: 62px; height: 44px; border-radius: 7px; overflow: hidden; flex-shrink: 0;
  background: var(--surface-2); display: grid; place-items: center; color: var(--text-2); font-size: 1.3rem;
}
.cwi-thumb img { width: 100%; height: 100%; object-fit: cover; }
.cwi-text { display: flex; flex-direction: column; min-width: 0; gap: 2px; }
.cwi-text strong { font-size: .87rem; line-height: 1.25; color: var(--text); }

/* ---------- Botones flotantes (tema / volver arriba) ---------- */
/* Botón de tema abajo a la derecha, encima del botón "volver arriba" (no tapa el banner) */
.theme-fab { position: fixed; bottom: 80px; right: 22px; z-index: 70; width: 46px; height: 46px; border-radius: 50%; background: var(--surface); box-shadow: var(--shadow); }
.scroll-top {
  position: fixed; bottom: 22px; right: 22px; z-index: 70; width: 46px; height: 46px; border-radius: 50%;
  border: none; background: var(--primary); color: #fff; font-size: 1.3rem; cursor: pointer; box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; transform: translateY(12px); transition: opacity .2s, transform .2s, visibility .2s;
}
.scroll-top:hover { background: var(--primary-hover); }
.scroll-top.show { opacity: 1; visibility: visible; transform: translateY(0); }

/* ---------- Modal de confirmación ---------- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 100; background: rgba(0,0,0,.55);
  display: grid; place-items: center; padding: 20px; animation: modalFade .18s ease-out;
}
.modal-box {
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  box-shadow: var(--shadow); padding: 30px 34px; text-align: center; max-width: 380px; width: 100%;
  animation: modalPop .2s ease-out;
}
.modal-icon { font-size: 3rem; color: var(--success); line-height: 1; margin-bottom: 10px; }
@keyframes modalFade { from { opacity: 0; } to { opacity: 1; } }
@keyframes modalPop { from { transform: scale(.92); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* ---------- Ajustes responsivos extra ---------- */
@media (max-width: 640px) {
  .grid-2 { grid-template-columns: 1fr; }
  .content { padding: 16px; }
  .page-title { font-size: 1.3rem; }
  .avatar { width: 38px; height: 38px; }
  .scroll-top { bottom: 16px; right: 16px; width: 42px; height: 42px; }
  .theme-fab { bottom: 68px; right: 16px; width: 42px; height: 42px; }
}

/* ---------- Encuesta SharpSpring embebida ---------- */
/* El formulario de SharpSpring carga en un iframe de otro dominio: su texto
   no puede re-colorearse con CSS del sitio. En modo oscuro se invierte el
   iframe completo (texto oscuro → claro) y hue-rotate conserva los matices. */
[data-theme="dark"] #encuesta iframe {
  filter: invert(1) hue-rotate(192deg) saturate(3) brightness(1.5);
}

/* ---------- Preguntas frecuentes (acordeón) ---------- */
.faq-item { border: 1px solid var(--border); border-radius: 10px; background: var(--surface-2); margin-bottom: 10px; }
.faq-item:last-child { margin-bottom: 0; }
.faq-item > summary {
  display: flex; align-items: center; gap: 12px; justify-content: space-between;
  padding: 13px 16px; cursor: pointer; font-weight: 600; font-size: .95rem; list-style: none;
}
.faq-item > summary::-webkit-details-marker { display: none; }
.faq-item > summary:hover { color: var(--primary); }
.faq-caret { flex-shrink: 0; transition: transform .18s ease; color: var(--text-2); }
.faq-item[open] > summary { color: var(--primary); }
.faq-item[open] .faq-caret { transform: rotate(180deg); }
.faq-answer {
  padding: 0 16px 15px; font-size: .92rem; line-height: 1.7; color: var(--text-2);
  border-top: 1px solid var(--border); padding-top: 13px; margin: 0 0 0;
}