:root {
  --fondo: #f3f5f4;
  --panel: #ffffff;
  --texto: #262222;
  --suave: #6b6f6e;
  --borde: #dfe4e2;
  --marca: #74cfaf;        /* verde del logo */
  --marca-fuerte: #23946e; /* el mismo verde, legible como texto y boton */
  --marca-tenue: #e6f6f0;
  --oscuro: #3a3333;       /* sombra del logo */
  --rojo: #c0392b;
  --rojo-tenue: #fbeceb;
  --ambar: #a86a00;
  --ambar-tenue: #fdf3e1;
  --radio: 10px;
  --sombra: 0 1px 2px rgba(0,0,0,.05), 0 2px 8px rgba(0,0,0,.04);
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--fondo); color: var(--texto); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: var(--marca-fuerte); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: 1.5rem; } h2 { font-size: 1.2rem; } h3 { font-size: 1rem; }
button, input, select, textarea { font: inherit; color: inherit; }
.cargando { padding: 40px; text-align: center; color: var(--suave); }
[hidden] { display: none !important; }

/* ---- botones y campos ---- */
.btn { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--borde); background: var(--panel); padding: 7px 14px; border-radius: 8px; cursor: pointer; font-weight: 500; white-space: nowrap; text-decoration: none; color: var(--texto); }
.btn:hover { border-color: #c6cdca; background: #fafbfb; }
.btn.prim { background: var(--marca-fuerte); border-color: var(--marca-fuerte); color: #fff; }
.btn.prim:hover { background: #1d805f; }
.btn.peligro { color: var(--rojo); }
.btn.peligro:hover { background: var(--rojo-tenue); border-color: #efc5c1; }
.btn.chico { padding: 3px 9px; font-size: .85rem; }
.btn:disabled { opacity: .5; cursor: default; }
.btn.icono { padding: 4px 8px; }
label.campo { display: block; margin-bottom: 12px; }
label.campo > span { display: block; font-size: .82rem; color: var(--suave); margin-bottom: 4px; font-weight: 500; }
input[type=text], input[type=email], input[type=password], input[type=date], input[type=search], select, textarea {
  width: 100%; border: 1px solid var(--borde); border-radius: 8px; padding: 8px 10px; background: #fff; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--marca); outline-offset: -1px; border-color: transparent; }
textarea { resize: vertical; min-height: 70px; }
.fila { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.fila.fin { justify-content: flex-end; }
.grilla2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
@media (max-width: 600px) { .grilla2 { grid-template-columns: 1fr; } }
.error { color: var(--rojo); font-size: .9rem; min-height: 1.4em; }
.suave { color: var(--suave); }
.chico { font-size: .85rem; }

/* ---- estructura ---- */
.barra { background: var(--panel); border-bottom: 1px solid var(--borde); position: sticky; top: 0; z-index: 20; }
.barra .dentro { max-width: 1280px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; gap: 16px; }
.barra img.logo { height: 26px; display: block; }
.barra .titulo-campus { font-weight: 600; color: var(--suave); border-left: 1px solid var(--borde); padding-left: 14px; font-size: .95rem; }
.barra nav { display: flex; gap: 4px; margin-left: 12px; }
.barra nav a { padding: 6px 12px; border-radius: 8px; text-decoration: none; color: var(--suave); font-weight: 500; }
.barra nav a.activo, .barra nav a:hover { background: var(--marca-tenue); color: var(--marca-fuerte); }
.barra .der { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.menu-usuario { position: relative; }
.menu-usuario .desplegable { position: absolute; right: 0; top: calc(100% + 6px); background: var(--panel); border: 1px solid var(--borde); border-radius: var(--radio); box-shadow: 0 8px 24px rgba(0,0,0,.1); min-width: 200px; padding: 6px; }
.menu-usuario .desplegable button { display: block; width: 100%; text-align: left; border: 0; background: none; padding: 8px 10px; border-radius: 6px; cursor: pointer; }
.menu-usuario .desplegable button:hover { background: var(--fondo); }
.avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--oscuro); color: #fff; display: grid; place-items: center; font-weight: 600; font-size: .85rem; border: 0; cursor: pointer; }
@media (max-width: 700px) {
  .barra .titulo-campus { display: none; }
  .barra nav { margin-left: 0; }
  .barra nav a { padding: 6px 8px; font-size: .9rem; }
}
.contenido { max-width: 1280px; margin: 0 auto; padding: 24px 16px 60px; }
.panel { background: var(--panel); border: 1px solid var(--borde); border-radius: var(--radio); box-shadow: var(--sombra); }
.panel.relleno { padding: 18px; }

/* ---- ingreso ---- */
.ingreso { min-height: 100vh; display: grid; place-items: center; padding: 16px; background: linear-gradient(160deg, #eef7f3 0%, var(--fondo) 60%); }
.ingreso .caja { width: 100%; max-width: 380px; padding: 30px 28px; }
.ingreso img { width: 210px; display: block; margin: 0 auto 6px; }
.ingreso .sub { text-align: center; color: var(--suave); margin-bottom: 24px; font-weight: 500; }
.ingreso .btn.prim { width: 100%; justify-content: center; padding: 10px; margin-top: 4px; }
.ingreso .pie { text-align: center; font-size: .82rem; color: var(--suave); margin-top: 18px; }

/* ---- mis cursos ---- */
.tarjetas { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 16px; }
.tarjeta-curso { padding: 18px; display: flex; flex-direction: column; gap: 10px; text-decoration: none; color: inherit; transition: border-color .15s, transform .15s; }
a.tarjeta-curso:hover { border-color: var(--marca); transform: translateY(-1px); }
.tarjeta-curso .desc { color: var(--suave); font-size: .9rem; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.tarjeta-curso.vencida { opacity: .75; }
.barra-progreso { height: 6px; background: #e9eeec; border-radius: 3px; overflow: hidden; }
.barra-progreso > i { display: block; height: 100%; background: var(--marca-fuerte); border-radius: 3px; }
.pill { display: inline-flex; align-items: center; gap: 4px; padding: 2px 9px; border-radius: 99px; font-size: .78rem; font-weight: 600; white-space: nowrap; }
.pill.ok { background: var(--marca-tenue); color: var(--marca-fuerte); }
.pill.mal { background: var(--rojo-tenue); color: var(--rojo); }
.pill.alerta { background: var(--ambar-tenue); color: var(--ambar); }
.pill.gris { background: #eef0ef; color: var(--suave); }
.vacio { text-align: center; padding: 50px 20px; color: var(--suave); }

/* ---- curso / reproductor ---- */
.curso { display: grid; grid-template-columns: 1fr 340px; gap: 20px; align-items: start; }
@media (max-width: 960px) { .curso { grid-template-columns: 1fr; } }
.visor-marco { background: #111; border-radius: var(--radio); overflow: hidden; position: relative; user-select: none; -webkit-user-select: none; }
.visor-marco video { width: 100%; display: block; aspect-ratio: 16/9; background: #000; }
.marca-agua { position: absolute; pointer-events: none; color: rgba(255,255,255,.28); font-size: 13px; font-weight: 600; text-shadow: 0 0 2px rgba(0,0,0,.4); transition: top 1.5s, left 1.5s; white-space: nowrap; z-index: 5; }
.visor-pdf { background: #e7eae9; border-radius: var(--radio); max-height: 78vh; overflow: auto; padding: 14px; position: relative; user-select: none; -webkit-user-select: none; }
.visor-pdf .pagina { position: relative; margin: 0 auto 14px; background: #fff; box-shadow: 0 1px 4px rgba(0,0,0,.15); max-width: 900px; min-height: 300px; }
.visor-pdf canvas { width: 100%; display: block; }
.visor-pdf .agua-pagina { position: absolute; inset: 0; pointer-events: none; overflow: hidden; display: flex; flex-wrap: wrap; align-content: space-around; justify-content: space-around; }
.visor-pdf .agua-pagina span { transform: rotate(-28deg); color: rgba(0,0,0,.07); font-weight: 700; font-size: 15px; padding: 30px 10px; white-space: nowrap; }
.visor-pdf .num { position: absolute; bottom: 6px; right: 10px; font-size: .75rem; color: var(--suave); }
.clase-info { padding: 16px 2px; }
.clase-info .fila { justify-content: space-between; }
.indice { position: sticky; top: 70px; max-height: calc(100vh - 90px); overflow: auto; }
@media (max-width: 960px) { .indice { position: static; max-height: none; } }
.indice .cab { padding: 14px 16px; border-bottom: 1px solid var(--borde); }
.indice .modulo > h4 { margin: 0; padding: 12px 16px 6px; font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--suave); }
.indice a.item { display: flex; gap: 10px; padding: 8px 16px; text-decoration: none; color: var(--texto); align-items: flex-start; border-left: 3px solid transparent; }
.indice a.item:hover { background: var(--fondo); }
.indice a.item.actual { background: var(--marca-tenue); border-left-color: var(--marca-fuerte); }
.indice .marca-vista { flex: 0 0 18px; height: 18px; border-radius: 50%; border: 2px solid #c7cecb; margin-top: 2px; display: grid; place-items: center; font-size: 11px; color: #fff; }
.indice .marca-vista.si { background: var(--marca-fuerte); border-color: var(--marca-fuerte); }
.indice .item small { display: block; color: var(--suave); font-size: .78rem; }
.banda-aviso { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: .92rem; }
.banda-aviso.alerta { background: var(--ambar-tenue); color: #6e4600; }
.banda-aviso.mal { background: var(--rojo-tenue); color: var(--rojo); }

/* ---- admin ---- */
.cifras { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-bottom: 20px; }
.cifra { padding: 14px 16px; }
.cifra b { display: block; font-size: 1.6rem; font-weight: 650; }
.cifra span { color: var(--suave); font-size: .85rem; }
table.tabla { width: 100%; border-collapse: collapse; }
.tabla th { text-align: left; font-size: .78rem; color: var(--suave); font-weight: 600; padding: 10px 12px; border-bottom: 1px solid var(--borde); text-transform: uppercase; letter-spacing: .03em; }
.tabla td { padding: 10px 12px; border-bottom: 1px solid #edf0ef; vertical-align: middle; }
.tabla tr.clic { cursor: pointer; }
.tabla tr.clic:hover td { background: #f8faf9; }
.tabla-scroll { overflow-x: auto; }
.chips { display: flex; gap: 4px; flex-wrap: wrap; }
.encabezado { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.encabezado h1 { margin: 0; margin-right: auto; }
.encabezado input[type=search] { max-width: 280px; }

.editor-curso { display: grid; grid-template-columns: 260px 1fr; gap: 20px; align-items: start; }
@media (max-width: 860px) { .editor-curso { grid-template-columns: 1fr; } }
.lista-cursos a { display: block; padding: 10px 14px; text-decoration: none; color: var(--texto); border-bottom: 1px solid #edf0ef; }
.lista-cursos a.actual { background: var(--marca-tenue); font-weight: 600; }
.lista-cursos a:last-child { border-bottom: 0; }
.modulo-ed { margin-top: 16px; }
.modulo-ed > .cab { display: flex; align-items: center; gap: 8px; padding: 10px 14px; background: #f7f9f8; border-bottom: 1px solid var(--borde); border-radius: var(--radio) var(--radio) 0 0; }
.modulo-ed > .cab b { margin-right: auto; }
.clase-ed { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-bottom: 1px solid #edf0ef; flex-wrap: wrap; }
.clase-ed:last-child { border-bottom: 0; }
.clase-ed .tit { flex: 1; min-width: 180px; }
.clase-ed .tipo { font-size: .72rem; font-weight: 700; color: var(--suave); background: #eef0ef; border-radius: 4px; padding: 2px 6px; }
.subida { flex-basis: 100%; }
.subida .barra-progreso { margin-top: 4px; }

/* ---- ventanas ---- */
.velo { position: fixed; inset: 0; background: rgba(20,24,23,.45); display: grid; place-items: center; z-index: 50; padding: 16px; }
.ventana { background: var(--panel); border-radius: 12px; width: 100%; max-width: 560px; max-height: calc(100vh - 32px); overflow: auto; box-shadow: 0 20px 50px rgba(0,0,0,.25); }
.ventana.ancha { max-width: 760px; }
.ventana .cab { padding: 16px 20px; border-bottom: 1px solid var(--borde); display: flex; align-items: center; }
.ventana .cab h2 { margin: 0; flex: 1; }
.ventana .cuerpo { padding: 18px 20px; }
.ventana .pie { padding: 12px 20px; border-top: 1px solid var(--borde); display: flex; gap: 8px; justify-content: flex-end; flex-wrap: wrap; }
.cerrar { border: 0; background: none; font-size: 22px; cursor: pointer; color: var(--suave); line-height: 1; }
.credenciales { background: var(--marca-tenue); border-radius: 8px; padding: 14px; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .9rem; white-space: pre-wrap; word-break: break-word; }
.seccion { margin-top: 20px; }
.seccion > h3 { font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; color: var(--suave); }
.insc { display: flex; align-items: center; gap: 8px; padding: 8px 0; border-bottom: 1px solid #edf0ef; flex-wrap: wrap; }
.insc .nom { flex: 1; min-width: 150px; font-weight: 500; }
.insc input[type=date] { width: auto; }

.aviso { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--oscuro); color: #fff; padding: 10px 18px; border-radius: 8px; z-index: 100; box-shadow: 0 6px 20px rgba(0,0,0,.25); max-width: calc(100vw - 32px); }
.aviso.mal { background: var(--rojo); }
.pantalla-completa { position: absolute; top: 10px; right: 10px; z-index: 6; background: rgba(0,0,0,.45); color: #fff; border: 0; border-radius: 6px; width: 34px; height: 34px; font-size: 18px; cursor: pointer; opacity: .75; display: grid; place-items: center; }
.pantalla-completa:hover { opacity: 1; }
.visor-marco:fullscreen { border-radius: 0; display: flex; align-items: center; background: #000; }
.visor-marco:fullscreen video { height: 100vh; aspect-ratio: auto; }
.visor-marco:fullscreen .marca-agua { font-size: 18px; }
.banda-aviso.ok { background: var(--marca-tenue); color: #155f47; }
.indice .modulo > h4 { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.cert-mod { text-transform: none; letter-spacing: 0; font-size: .78rem; font-weight: 600; color: var(--marca-fuerte); text-decoration: none; background: var(--marca-tenue); padding: 2px 8px; border-radius: 99px; white-space: nowrap; }
.cert-mod:hover { background: #d3efe4; }
.pie-indice { padding: 12px 16px; border-top: 1px solid var(--borde); }
.ic-cert { width: 1.15em; height: 1.15em; vertical-align: -0.2em; }
.cert-grande .ic-cert { width: 56px; height: 56px; }