:root {
    --naranja: #ee7c00;
    --naranja-claro: #f0b000;
    --oscuro: #0a0a0a;
    --texto: #1e1e1e;
    --texto-suave: #666;
    --borde: #e2e2e2;
    --fondo: #f7f7f7;
    --blanco: #fff;
    --verde: #1a8a4a;
    --rojo: #c0392b;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: Inter, "Segoe UI", Tahoma, Arial, sans-serif;
    background: var(--fondo);
    color: var(--texto);
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
.ic { display: inline-block; vertical-align: -3px; flex-shrink: 0; }
button { font-family: inherit; }

/* ===== Header ===== */
.topbar {
    position: sticky; top: 0; z-index: 100;
    background: var(--oscuro);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 20px; height: 58px;
}
.topbar .brand {
    display: flex; align-items: center; gap: 8px;
    color: #fff; text-decoration: none; font-weight: 800; font-size: 18px; letter-spacing: .01em;
}
.topbar .brand span { color: var(--naranja); }
.topbar .brand small {
    font-weight: 500; font-size: 12px; color: #bbb; letter-spacing: 0; margin-left: 6px;
}
#cuentaBox { display: flex; align-items: center; gap: 14px; }

.tbtn-link {
    display: inline-flex; align-items: center; gap: 6px;
    background: none; border: 1px solid #333; color: #fff;
    padding: 7px 14px; border-radius: 6px; cursor: pointer; font-size: 13px; font-weight: 600;
}
.tbtn-link:hover { border-color: var(--naranja); color: var(--naranja); }

.nombre-usuario { display: flex; align-items: center; gap: 6px; color: #ddd; font-size: 13px; font-weight: 600; }
.badge-puntos {
    display: flex; align-items: center; gap: 5px;
    background: linear-gradient(180deg, var(--naranja-claro), var(--naranja));
    color: #fff; padding: 5px 11px; border-radius: 20px; font-size: 13px; font-weight: 800;
}

/* ===== Hero ===== */
.hero { text-align: center; padding: 48px 16px 28px; max-width: 720px; margin: 0 auto; }
.hero h1 { font-size: 30px; margin: 0 0 10px; }
.hero p { color: var(--texto-suave); font-size: 15px; margin: 0; }

.search-container { position: relative; max-width: 480px; margin: 24px auto 0; }
.search-container .ic { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: #999; }
.search-input {
    width: 100%; height: 44px; border: 1px solid var(--borde); border-radius: 8px;
    padding: 0 14px 0 40px; font-size: 15px; background: #fff;
}
.search-input:focus { outline: 2px solid var(--naranja); outline-offset: 0; border-color: var(--naranja); }

/* ===== Grid de sistemas ===== */
.contenedor { max-width: 1080px; margin: 0 auto; padding: 8px 20px 60px; }
.grid-sistemas { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; margin-top: 8px; }

.card-sistema {
    display: block; text-decoration: none; color: inherit;
    background: #fff; border: 1px solid var(--borde); border-radius: 10px; padding: 20px;
    transition: transform .12s, box-shadow .12s; position: relative; overflow: hidden;
}
.card-sistema:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,.08); }
.card-sistema .franja { position: absolute; left: 0; top: 0; bottom: 0; width: 5px; }
.card-sistema .icono-sistema {
    width: 42px; height: 42px; border-radius: 10px; display: flex; align-items: center; justify-content: center;
    color: #fff; margin-bottom: 14px;
}
.card-sistema h3 { margin: 0 0 6px; font-size: 17px; }
.card-sistema p { margin: 0; color: var(--texto-suave); font-size: 13px; line-height: 1.5; min-height: 36px; }
.card-sistema .meta { margin-top: 14px; font-size: 12px; color: #999; font-weight: 600; display: flex; align-items: center; gap: 5px; }

.vacio { text-align: center; padding: 60px 20px; color: #999; }
.vacio .ic { color: #ccc; margin-bottom: 10px; }

/* ===== Página de sistema ===== */
.encabezado-sistema {
    padding: 32px 20px 20px; max-width: 1080px; margin: 0 auto;
}
.volver { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--texto-suave); text-decoration: none; margin-bottom: 14px; }
.volver:hover { color: var(--naranja); }
.encabezado-sistema h1 { margin: 0 0 6px; font-size: 26px; }
.encabezado-sistema .desc { color: var(--texto-suave); font-size: 14px; margin: 0 0 16px; max-width: 640px; }

.barra-progreso-sistema { max-width: 420px; }
.barra-progreso-sistema .rotulo { display: flex; justify-content: space-between; font-size: 12px; font-weight: 700; color: var(--texto-suave); margin-bottom: 5px; }
.barra { height: 8px; background: #eee; border-radius: 8px; overflow: hidden; }
.barra > div { height: 100%; background: linear-gradient(90deg, var(--naranja-claro), var(--naranja)); border-radius: 8px; transition: width .3s; }

.categoria-bloque { max-width: 1080px; margin: 0 auto; padding: 6px 20px 28px; }
.categoria-bloque h2 { font-size: 16px; display: flex; align-items: center; gap: 8px; margin: 0 0 12px; color: var(--texto); }
.categoria-bloque h2 .contador { font-weight: 500; color: #999; font-size: 13px; }

.grid-tutoriales { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }

.card-tutorial {
    background: #fff; border: 1px solid var(--borde); border-radius: 10px; overflow: hidden;
    cursor: pointer; position: relative; transition: box-shadow .12s;
}
.card-tutorial:hover { box-shadow: 0 4px 14px rgba(0,0,0,.08); }
.card-tutorial.completado { border-color: var(--verde); }

.card-tutorial .thumb-wrap {
    position: relative; width: 100%; aspect-ratio: 16 / 9; background: #16181c;
    background-size: cover; background-position: center; overflow: hidden;
}
.card-tutorial .thumb-wrap img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.card-tutorial .play-overlay {
    position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
}
.card-tutorial .play-overlay .circulo {
    width: 42px; height: 42px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    background: rgba(0,0,0,.5); color: #fff; transition: background .12s, transform .12s;
}
.card-tutorial:hover .play-overlay .circulo { background: var(--naranja); transform: scale(1.06); }
.card-tutorial .chip-completado {
    position: absolute; top: 8px; right: 8px;
    display: flex; align-items: center; gap: 4px; color: #fff; font-size: 11px; font-weight: 700;
    background: rgba(26,138,74,.92); padding: 3px 8px; border-radius: 20px;
}

.card-tutorial .card-body { padding: 14px 16px 16px; }
.card-tutorial h4 { margin: 0 0 6px; font-size: 14px; line-height: 1.4; }
.card-tutorial .desc-corta { margin: 0; font-size: 12.5px; color: var(--texto-suave); line-height: 1.5; max-height: 54px; overflow: hidden; }
.card-tutorial .meta-fila { display: flex; align-items: center; gap: 12px; margin-top: 12px; font-size: 12px; color: #999; }
.card-tutorial .meta-fila span { display: flex; align-items: center; gap: 4px; }
.card-tutorial .mini-barra { height: 4px; background: #eee; border-radius: 4px; margin-top: 10px; overflow: hidden; }
.card-tutorial .mini-barra > div { height: 100%; background: var(--naranja); }

/* ===== Modal de video ===== */
.overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,.7); z-index: 300;
    display: flex; align-items: center; justify-content: center; padding: 20px;
}
.overlay[hidden] { display: none; }
.modal {
    background: #fff; border-radius: 12px; max-width: 760px; width: 100%; max-height: 92vh; overflow-y: auto;
    position: relative; padding: 0;
}
.modal-chico { max-width: 400px; padding: 28px 26px; }
.modal-x {
    position: absolute; top: 12px; right: 12px; background: rgba(0,0,0,.55); color: #fff; border: none;
    width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    cursor: pointer; z-index: 2;
}
.modal-chico .modal-x { background: none; color: #999; }

.video-wrap { position: relative; width: 100%; padding-top: 56.25%; background: #000; border-radius: 12px 12px 0 0; overflow: hidden; }
.video-wrap iframe, .video-wrap video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; background: #000; }
.video-wrap.otro { display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 14px; color: #ccc; }

.modal-cuerpo { padding: 22px 26px 26px; }
.modal-cuerpo .categoria-tag { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--naranja); }
.modal-cuerpo h2 { margin: 6px 0 12px; font-size: 20px; }
.modal-cuerpo .descripcion { font-size: 14px; line-height: 1.7; color: #333; white-space: pre-wrap; margin: 0 0 18px; }

.barra-progreso-video { margin-bottom: 18px; }
.barra-progreso-video .rotulo { font-size: 12px; color: var(--texto-suave); margin-bottom: 5px; display: flex; justify-content: space-between; }

.acciones-video { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; padding-top: 16px; border-top: 1px solid #eee; }
.accion-btn {
    display: inline-flex; align-items: center; gap: 6px; background: #f2f2f2; border: 1px solid var(--borde);
    padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 13px; font-weight: 600; color: #444;
}
.accion-btn:hover { background: #eee; }
.accion-btn.activo { background: #fff0e0; border-color: var(--naranja); color: #c85000; }
.accion-btn.activo .ic { color: var(--naranja); }

.calificar { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.estrellas { display: flex; gap: 2px; }
.estrellas button { background: none; border: none; padding: 2px; cursor: pointer; color: #ccc; }
.estrellas button.activa, .estrellas button:hover { color: var(--naranja-claro); }
.estrellas.solo-lectura button { cursor: default; }
.rating-info { font-size: 12px; color: #999; }

.aviso-completado {
    display: none; align-items: center; gap: 8px; background: #eafaf0; color: var(--verde);
    padding: 10px 14px; border-radius: 8px; font-size: 13px; font-weight: 700; margin-top: 14px;
}
.aviso-completado.visible { display: flex; }

.necesita-login { font-size: 12.5px; color: #999; margin-top: 14px; }
.necesita-login button { background: none; border: none; color: var(--naranja); font-weight: 700; cursor: pointer; padding: 0; font-size: inherit; }

/* ===== Formularios de cuenta ===== */
.tabs-cuenta { display: flex; gap: 6px; margin-bottom: 20px; }
.tab-cuenta {
    flex: 1; background: #f2f2f2; border: none; padding: 9px; border-radius: 7px; cursor: pointer;
    font-size: 13px; font-weight: 700; color: #777;
}
.tab-cuenta.activo { background: var(--oscuro); color: #fff; }
.form-cuenta .campo { margin-bottom: 14px; }
.form-cuenta label { display: block; font-size: 12.5px; font-weight: 700; color: #555; margin-bottom: 5px; }
.form-cuenta input {
    width: 100%; height: 40px; border: 1px solid var(--borde); border-radius: 6px; padding: 0 12px; font-size: 14px;
}
.form-cuenta input:focus { outline: 2px solid var(--naranja); outline-offset: 0; border-color: var(--naranja); }
.error-cuenta { color: var(--rojo); font-size: 12.5px; margin: -6px 0 12px; }
.ayuda-cuenta { font-size: 12px; color: #999; text-align: center; margin: 18px 0 0; line-height: 1.5; }

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    border: none; border-radius: 7px; padding: 10px 18px; font-size: 14px; font-weight: 700; cursor: pointer;
}
.btn-primario { background: linear-gradient(180deg, var(--naranja-claro), var(--naranja)); color: #fff; width: 100%; }
.btn-primario:hover { filter: brightness(1.05); }
.btn-secundario { background: #f2f2f2; color: #333; }

footer.pie { text-align: center; padding: 30px 16px; color: #999; font-size: 12.5px; }
footer.pie span { color: var(--naranja); }

.toast {
    position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
    background: var(--oscuro); color: #fff; padding: 12px 20px; border-radius: 8px; font-size: 13.5px;
    display: flex; align-items: center; gap: 8px; z-index: 500; opacity: 0; transition: all .25s; pointer-events: none;
}
.toast.visible { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast .ic { color: var(--naranja-claro); }

/* ===== Admin ===== */
.admin-shell { display: flex; min-height: calc(100vh - 58px); }
.admin-sidebar { width: 240px; background: #fff; border-right: 1px solid var(--borde); padding: 18px 10px; flex-shrink: 0; }
.admin-sidebar .item-sistema {
    display: flex; align-items: center; justify-content: space-between; gap: 8px;
    padding: 9px 10px; border-radius: 6px; cursor: pointer; font-size: 13.5px; margin-bottom: 3px;
}
.admin-sidebar .item-sistema:hover { background: #f5f5f5; }
.admin-sidebar .item-sistema.activo { background: #fff0e0; color: #c85000; font-weight: 700; }
.admin-sidebar .item-sistema .franja-mini { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.admin-sidebar .item-sistema .nom { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.admin-main { flex: 1; padding: 24px 28px; max-width: 900px; }
.admin-main h2 { margin: 0 0 4px; font-size: 19px; }
.admin-main .subtitulo { color: var(--texto-suave); font-size: 13px; margin: 0 0 20px; }

.fila-admin-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; gap: 10px; flex-wrap: wrap; }

.tabla-admin { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--borde); border-radius: 8px; overflow: hidden; }
.tabla-admin th, .tabla-admin td { text-align: left; padding: 10px 12px; font-size: 13px; border-bottom: 1px solid #eee; }
.tabla-admin th { background: #fafafa; font-size: 11.5px; text-transform: uppercase; letter-spacing: .03em; color: #888; }
.tabla-admin tr:last-child td { border-bottom: none; }
.tabla-admin td.acciones { display: flex; gap: 6px; justify-content: flex-end; }
.tabla-admin .icon-btn { background: none; border: 1px solid var(--borde); border-radius: 6px; width: 30px; height: 30px; display: inline-flex; align-items: center; justify-content: center; cursor: pointer; color: #666; }
.tabla-admin .icon-btn:hover { background: #f5f5f5; }
.tabla-admin .icon-btn.peligro:hover { border-color: var(--rojo); color: var(--rojo); }
.tabla-admin .link-publico { font-size: 12px; color: #999; }
.tabla-admin .link-publico code { background: #f2f2f2; padding: 1px 5px; border-radius: 4px; }

.form-panel { background: #fff; border: 1px solid var(--borde); border-radius: 10px; padding: 20px; margin-bottom: 20px; }
.form-panel .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-panel .campo { margin-bottom: 14px; }
.form-panel label { display: block; font-size: 12.5px; font-weight: 700; color: #555; margin-bottom: 5px; }
.form-panel input, .form-panel textarea {
    width: 100%; border: 1px solid var(--borde); border-radius: 6px; padding: 8px 10px; font-size: 13.5px; font-family: inherit;
}
.form-panel input[type=color] { padding: 3px; height: 38px; }
.form-panel textarea { resize: vertical; min-height: 60px; }
.form-panel .acciones-form { display: flex; gap: 8px; justify-content: flex-end; margin-top: 4px; }
.checkbox-linea { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.checkbox-linea input { width: auto; }

.login-admin { max-width: 360px; margin: 80px auto; background: #fff; border: 1px solid var(--borde); border-radius: 10px; padding: 30px; }
.login-admin h2 { margin: 0 0 4px; }
.login-admin p.subtitulo { margin: 0 0 20px; }

.migas { font-size: 12.5px; color: #999; margin-bottom: 8px; }
.migas button { background: none; border: none; color: var(--naranja); cursor: pointer; font-size: inherit; padding: 0; font-weight: 700; }

.cargando { text-align: center; padding: 60px 20px; color: #999; }

@media (max-width: 720px) {
    .admin-shell { flex-direction: column; }
    .admin-sidebar { width: auto; border-right: none; border-bottom: 1px solid var(--borde); display: flex; overflow-x: auto; gap: 4px; }
    .admin-sidebar .item-sistema { flex-shrink: 0; }
    .form-panel .grid-2 { grid-template-columns: 1fr; }
    .calificar { margin-left: 0; width: 100%; justify-content: flex-start; }
}