/* ==========================================================================
   FASE 0 — Cuentas, sesion y control de acceso  (autoria: Claude, 2026-05-31)
   Reutiliza la paleta premium de estilo.css. Namespaced para no chocar.
   ========================================================================== */

/* ---- Navegacion con sesion ---- */
.nav-main { display: flex; align-items: center; gap: 1.4rem; }
.nav-cta {
    background: var(--verde); color: #fff !important; padding: .5rem 1rem;
    border-radius: 10px; font-weight: 600; transition: var(--tr);
}
.nav-cta:hover { background: var(--verde-osc); transform: translateY(-1px); }
.nav-user { position: relative; }
.nav-avatar {
    width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center;
    background: var(--azul); color: #fff; font-weight: 700; cursor: pointer;
    font-family: 'Outfit', sans-serif; box-shadow: var(--sombra-sm);
    border: none; font-size: 1rem; padding: 0;
}
.nav-avatar:hover { background: var(--azul2); }
.nav-menu {
    position: absolute; right: 0; top: calc(100% + 8px); background: #fff; border-radius: 14px;
    box-shadow: var(--sombra-lg); border: 1px solid var(--linea); padding: .6rem;
    min-width: 220px; display: none; flex-direction: column; gap: .15rem; z-index: 50;
}
/* Puente invisible para que el cursor no "caiga" en el hueco */
.nav-menu::before {
    content: ''; position: absolute; top: -10px; left: 0; right: 0; height: 10px;
}
.nav-user.open .nav-menu { display: flex; }
.nav-menu-name { font-weight: 700; padding: .4rem .6rem 0; color: var(--tinta); }
.nav-menu-mail { font-size: .8rem; color: var(--gris2); padding: 0 .6rem .5rem;
    border-bottom: 1px solid var(--linea); margin-bottom: .3rem; }
.nav-menu a { padding: .55rem .6rem; border-radius: 8px; color: var(--tinta); }
.nav-menu a:hover { background: var(--azul-light); }

/* ---- Mensajes flash ---- */
.flash-zona { max-width: 680px; margin: 1rem auto 0; padding: 0 1.2rem; position: sticky; top: 12px; z-index: 60; }
.flash { padding: .85rem 1.1rem; border-radius: 12px; margin-bottom: .6rem; font-weight: 500;
    box-shadow: var(--sombra); border: 1px solid var(--linea); }
.flash-ok  { background: var(--verde-glow); color: var(--verde-osc); border-color: var(--verde2); }
.flash-err { background: #fff1f0; color: #b42318; border-color: #fda29b; }

/* ---- Pantallas de autenticacion ---- */
.auth-wrap { min-height: 72vh; display: grid; place-items: center; padding: 3rem 1.2rem; }
.auth-card {
    width: 100%; max-width: 440px; background: #fff; border-radius: 22px;
    box-shadow: var(--sombra-lg); border: 1px solid var(--linea); padding: 2.6rem 2.2rem;
}
.auth-logo { text-align: center; margin-bottom: 1rem; }
.auth-logo img { height: 56px; width: auto; }
.auth-titulo { font-size: 1.7rem; text-align: center; color: var(--azul); margin-bottom: .3rem; }
.auth-sub { text-align: center; color: var(--gris); margin-bottom: 1.6rem; }
.auth-form { display: flex; flex-direction: column; gap: 1rem; }
.auth-form label { display: flex; flex-direction: column; gap: .35rem; font-weight: 600;
    color: var(--tinta); font-size: .92rem; }
.auth-form label small { font-weight: 400; color: var(--gris2); }
.auth-form input {
    padding: .8rem .9rem; border: 1.5px solid var(--linea); border-radius: 11px;
    font-size: 1rem; font-family: inherit; background: var(--bg); transition: var(--tr);
}
.auth-form input:focus { outline: none; border-color: var(--verde2);
    background: #fff; box-shadow: 0 0 0 4px var(--verde-glow); }
.auth-fila { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.btn-block { width: 100%; justify-content: center; }
.auth-pie { text-align: center; margin-top: 1.3rem; color: var(--gris); }
.auth-pie a { color: var(--verde-osc); font-weight: 600; }
.auth-error, .auth-ok { padding: .8rem 1rem; border-radius: 12px; margin-bottom: 1.2rem; font-size: .92rem; }
.auth-error { background: #fff1f0; color: #b42318; border: 1px solid #fda29b; }
.auth-ok { background: var(--verde-glow); color: var(--verde-osc); border: 1px solid var(--verde2); }
.auth-error ul { margin: 0; padding-left: 1.1rem; }
.bloque-msg { max-width: 100%; }
.cta-doble { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ---- Panel del alumno (mis cursos) ---- */
.panel-head { background: linear-gradient(160deg, var(--azul), var(--azul2));
    color: #fff; padding: 2.6rem 0 2.2rem; }
.panel-head .seccion-in { max-width: 1100px; margin: 0 auto; padding: 0 1.4rem; }
.panel-head h1 { font-size: 2rem; }
.panel-saludo { color: var(--verde2); font-weight: 600; margin-bottom: .3rem; }
.panel-sub { color: rgba(255,255,255,.8); }
.panel-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.4rem; }
.panel-card {
    background: #fff; border-radius: 18px; padding: 1.5rem; box-shadow: var(--sombra);
    border: 1px solid var(--linea); border-top: 4px solid var(--c, var(--verde));
    display: flex; flex-direction: column; gap: .7rem; transition: var(--tr);
}
.panel-card:hover { box-shadow: var(--sombra-lg); transform: translateY(-3px); }
.panel-card.no-disp { opacity: .6; }
.panel-card h3 { color: var(--azul); font-size: 1.15rem; }
.panel-card-top { display: flex; justify-content: space-between; align-items: center; }
.panel-nivel-badge { font-size: .75rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: .04em; color: var(--c, var(--verde)); }
.panel-card-desc { color: var(--gris); font-size: .92rem; flex: 1; }
.panel-card-foot { margin-top: auto; display: flex; flex-direction: column; gap: .5rem; }
.panel-prog { display: flex; align-items: center; gap: .6rem; font-size: .82rem; color: var(--gris); }
.panel-prog-bar { flex: 1; height: 7px; background: var(--azul-light); border-radius: 99px; overflow: hidden; }
.panel-prog-bar div { height: 100%; background: var(--verde); border-radius: 99px; }
.tag { font-size: .72rem; font-weight: 700; padding: .2rem .55rem; border-radius: 99px; }
.tag-ok { background: var(--verde-glow); color: var(--verde-osc); }
.tag-free { background: var(--amarillo-light); color: var(--amarillo); }
.tag-lock { background: var(--azul-light); color: var(--azul2); }
.proximamente { color: var(--gris2); font-style: italic; }
.ver-muestra { text-align: center; color: var(--gris); font-size: .85rem; }
.ver-muestra:hover { color: var(--verde-osc); }

/* ---- Boton comprar ---- */
.btn-comprar {
    display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
    background: var(--azul); color: #fff !important; padding: .7rem 1.1rem; border-radius: 11px;
    font-weight: 600; transition: var(--tr); border: none; cursor: pointer; text-align: center;
}
.btn-comprar:hover { background: var(--azul2); transform: translateY(-1px); box-shadow: var(--sombra); }

/* ---- Pagina comprar ---- */
.comprar-wrap { min-height: 72vh; display: grid; place-items: center; padding: 3rem 1.2rem; }
.comprar-card { width: 100%; max-width: 520px; background: #fff; border-radius: 22px;
    box-shadow: var(--sombra-lg); border: 1px solid var(--linea);
    border-top: 5px solid var(--c, var(--verde)); padding: 2.6rem; }
.comprar-badge { font-weight: 700; text-transform: uppercase; letter-spacing: .05em;
    color: var(--c, var(--verde)); font-size: .8rem; }
.comprar-card h1 { color: var(--azul); margin: .4rem 0; font-size: 1.7rem; }
.comprar-sub { color: var(--gris); margin-bottom: 1.4rem; }
.comprar-precio { display: flex; align-items: baseline; gap: .4rem; flex-wrap: wrap;
    padding: 1.1rem 0; border-top: 1px solid var(--linea); border-bottom: 1px solid var(--linea); }
.precio-num { font-size: 2.6rem; font-weight: 800; color: var(--azul); font-family: 'Outfit', sans-serif; }
.precio-moneda { font-weight: 700; color: var(--gris); }
.precio-nota { color: var(--gris2); font-size: .85rem; margin-left: auto; }
.comprar-incluye { list-style: none; padding: 1.3rem 0; display: flex; flex-direction: column; gap: .6rem; }
.comprar-incluye li { color: var(--tinta); }
.comprar-demo-nota { font-size: .82rem; color: var(--gris); margin-top: .8rem;
    background: var(--amarillo-light); padding: .7rem .9rem; border-radius: 10px; }

/* ---- Aviso de compra dentro del curso ---- */
.aviso-compra { display: flex; align-items: center; gap: 1.2rem; flex-wrap: wrap;
    background: linear-gradient(135deg, var(--azul-light), #fff); border: 1px solid var(--linea);
    border-left: 4px solid var(--c, var(--verde)); border-radius: 14px; padding: 1.1rem 1.3rem;
    margin-bottom: 1.5rem; }
.aviso-compra-txt { flex: 1; min-width: 220px; color: var(--tinta); font-size: .95rem; }
.bloqueada-fila { opacity: .55; cursor: not-allowed; }

/* ---- Fin de muestra (leccion preview) ---- */
.fin-muestra { text-align: center; background: linear-gradient(160deg, var(--azul-light), #fff);
    border: 1px solid var(--linea); border-radius: 20px; padding: 2.4rem; margin-top: 2rem; }
.fin-muestra-ic { width: 56px; height: 56px; border-radius: 50%; background: #fff; display: grid;
    place-items: center; margin: 0 auto 1rem; box-shadow: var(--sombra); color: var(--c, var(--azul)); }
.fin-muestra h3 { color: var(--azul); font-size: 1.4rem; margin-bottom: .5rem; }
.fin-muestra p { color: var(--gris); max-width: 460px; margin: 0 auto 1.4rem; }
.volver-muestra { display: block; margin-top: 1rem; color: var(--gris); font-size: .9rem; }

/* ---- Perfil ---- */
.perfil-bloque { background: #fff; border-radius: 16px; box-shadow: var(--sombra);
    border: 1px solid var(--linea); padding: 1.6rem; margin-bottom: 1.4rem; }
.perfil-bloque h3 { color: var(--azul); margin-bottom: .3rem; }
.perfil-nota { color: var(--gris2); font-size: .88rem; margin-bottom: 1rem; }

/* ---- Admin ---- */
.admin-toolbar { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.4rem; }
.admin-hint { color: var(--gris2); font-size: .85rem; }
.admin-tabla-wrap { overflow-x: auto; background: #fff; border-radius: 16px;
    box-shadow: var(--sombra); border: 1px solid var(--linea); }
.admin-tabla { width: 100%; border-collapse: collapse; font-size: .9rem; }
.admin-tabla th { text-align: left; padding: .9rem 1rem; background: var(--azul-light);
    color: var(--azul); font-weight: 700; white-space: nowrap; }
.admin-tabla td { padding: .8rem 1rem; border-top: 1px solid var(--linea); vertical-align: middle; }
.admin-tabla td.mail { color: var(--gris); }
.chip { display: inline-block; background: var(--verde-glow); color: var(--verde-osc);
    padding: .15rem .5rem; border-radius: 7px; font-size: .76rem; margin: .1rem; font-weight: 600; }
.muted { color: var(--gris2); }
.admin-acc { display: flex; gap: .35rem; align-items: center; }
.admin-acc select { padding: .35rem .5rem; border-radius: 8px; border: 1px solid var(--linea); }
.btn-mini { padding: .35rem .6rem; border-radius: 8px; border: 1px solid var(--verde2);
    background: #fff; color: var(--verde-osc); font-weight: 600; cursor: pointer; font-size: .8rem; }
.btn-mini:hover { background: var(--verde-glow); }
.btn-mini-red { border-color: #fda29b; color: #b42318; }
.btn-mini-red:hover { background: #fff1f0; }

/* ---- Protección de contenido del curso ---- */
.leccion-contenido.protegido {
    -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; user-select: none;
    -webkit-touch-callout: none; position: relative;
}
.leccion-contenido.protegido img { -webkit-user-drag: none; user-drag: none; pointer-events: none; }
/* Marca de agua tenue con el correo del alumno */
.cw-marca {
    position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 0;
    opacity: .05; transform: rotate(-24deg); transform-origin: center;
    font-size: 1.05rem; font-weight: 700; line-height: 3.4; color: var(--azul);
    word-spacing: .4rem; letter-spacing: .06rem; white-space: normal;
    user-select: none;
}
.leccion-contenido.protegido > *:not(.cw-marca) { position: relative; z-index: 1; }

@media (max-width: 560px) {
    .auth-fila { grid-template-columns: 1fr; }
    .auth-card, .comprar-card { padding: 1.8rem 1.3rem; }
}