/* ============================================================
   layout.css — Sidebar, header y grid principal
   SitecAcademico · Universidad Panamericana
   ============================================================ */

/* ── Variables de layout ─────────────────────────────── */
:root {
  --sidebar-ancho:      260px;
  --sidebar-colapsado:  68px;
  --header-alto:        60px;
}

/* ── Estructura principal ────────────────────────────── */
.app {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ─────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-ancho);
  background: var(--azul);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  transition: width 0.25s ease;
  overflow: hidden;
}

.sidebar.colapsado { width: var(--sidebar-colapsado); }

/* Logo / marca */
.sidebar-marca {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
  height: var(--header-alto);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  flex-shrink: 0;
}

.sidebar-marca-icono {
  width: 36px; height: 36px;
  background: var(--amarillo);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-marca-texto {
  overflow: hidden;
  white-space: nowrap;
}

.sidebar-marca-nombre {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--blanco);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.2;
}

.sidebar-marca-lema {
  font-size: 0.68rem;
  color: var(--amarillo);
  font-style: italic;
}

/* Navegación */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px 0;
}

.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 2px; }

.nav-seccion {
  padding: 0 8px;
  margin-bottom: 4px;
}

.nav-seccion-titulo {
  font-size: 0.65rem;
  font-weight: 700;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 8px 8px 4px;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar.colapsado .nav-seccion-titulo { opacity: 0; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 8px;
  border-radius: var(--radio);
  color: rgba(255,255,255,0.75);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
  overflow: hidden;
  position: relative;
  user-select: none;
}

.nav-item:hover { background: rgba(255,255,255,0.08); color: var(--blanco); }
.nav-item.activo { background: rgba(245,197,24,0.18); color: var(--blanco); }
.nav-item.activo .nav-icono { color: var(--amarillo); }

.nav-icono {
  width: 20px; height: 20px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  transition: color 0.15s;
}
.nav-item:hover .nav-icono { color: var(--blanco); }

.nav-texto { flex: 1; overflow: hidden; text-overflow: ellipsis; }

.nav-chevron {
  flex-shrink: 0;
  color: rgba(255,255,255,0.4);
  transition: transform 0.2s;
}
.nav-item.abierto .nav-chevron { transform: rotate(90deg); }

/* Submenú */
.nav-submenu {
  display: none;
  padding: 2px 0 4px 36px;
}
.nav-submenu.visible { display: block; }

.nav-subitem {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 8px;
  border-radius: var(--radio);
  color: rgba(255,255,255,0.6);
  font-size: 0.82rem;
  font-weight: 400;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.nav-subitem:hover { background: rgba(255,255,255,0.06); color: var(--blanco); }
.nav-subitem.activo { color: var(--amarillo); font-weight: 500; }

/* Footer del sidebar */
.sidebar-footer {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 12px 8px;
  flex-shrink: 0;
}

.sidebar-usuario {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: var(--radio);
  cursor: pointer;
  transition: background 0.15s;
  overflow: hidden;
}
.sidebar-usuario:hover { background: rgba(255,255,255,0.08); }

.usuario-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--amarillo);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--azul);
  flex-shrink: 0;
}

.usuario-info { overflow: hidden; flex: 1; }
.usuario-nombre {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--blanco);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.usuario-rol {
  font-size: 0.7rem;
  color: rgba(255,255,255,0.5);
}

/* ── Contenido principal ─────────────────────────────── */
.contenido-principal {
  margin-left: var(--sidebar-ancho);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left 0.25s ease;
}

.sidebar.colapsado ~ .contenido-principal {
  margin-left: var(--sidebar-colapsado);
}

/* ── Header ──────────────────────────────────────────── */
.header {
  height: var(--header-alto);
  background: var(--blanco);
  border-bottom: 1px solid var(--gris-borde);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--sombra);
}

.header-toggle {
  background: none;
  border: none;
  color: var(--gris-texto);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
}
.header-toggle:hover { background: var(--gris-claro); color: var(--texto); }

.header-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--gris-texto);
  flex: 1;
}

.header-breadcrumb .pagina-actual {
  color: var(--texto);
  font-weight: 600;
}

.header-breadcrumb .separador-bc {
  color: var(--gris-borde);
}

.header-acciones {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-btn {
  background: none;
  border: none;
  color: var(--gris-texto);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 8px;
  transition: background 0.15s, color 0.15s;
  position: relative;
}
.header-btn:hover { background: var(--gris-claro); color: var(--texto); }

.header-notif-badge {
  position: absolute;
  top: 6px; right: 6px;
  width: 8px; height: 8px;
  background: var(--error);
  border-radius: 50%;
  border: 1.5px solid var(--blanco);
}

.header-perfil {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px 4px 4px;
  border-radius: 999px;
  border: 1px solid var(--gris-borde);
  background: var(--blanco);
  cursor: pointer;
  transition: background 0.15s;
  font-size: 0.82rem;
}
.header-perfil:hover { background: var(--gris-claro); }

.perfil-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--azul);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--blanco);
  flex-shrink: 0;
}

.perfil-nombre {
  font-weight: 500;
  color: var(--texto);
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Cuerpo de página ────────────────────────────────── */
.pagina {
  flex: 1;
  padding: 24px;
}

.pagina-encabezado {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 16px;
  flex-wrap: wrap;
}

.pagina-titulo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.pagina-titulo-icono {
  width: 40px; height: 40px;
  background: var(--azul-claro);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--azul);
  flex-shrink: 0;
}

.pagina-titulo-texto h1 {
  font-size: 1.25rem;
  color: var(--negro);
}

.pagina-titulo-texto p {
  font-size: 0.8rem;
  color: var(--gris-texto);
  margin-top: 2px;
}

.pagina-acciones {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ── Sidebar colapsado — solo íconos ─────────────────── */
.sidebar.colapsado .nav-texto,
.sidebar.colapsado .nav-chevron,
.sidebar.colapsado .usuario-info,
.sidebar.colapsado .sidebar-marca-texto {
  display: none;
}

.sidebar.colapsado .nav-item {
  justify-content: center;
  padding: 9px;
}

.sidebar.colapsado .nav-submenu {
  display: none !important;
}

.sidebar.colapsado .nav-seccion {
  padding: 0 4px;
}

.sidebar.colapsado .sidebar-usuario {
  justify-content: center;
}

.sidebar.colapsado .sidebar-marca {
  justify-content: center;
  padding: 0;
}

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.25s ease, width 0.25s ease;
  }
  .sidebar.abierto-mobile { transform: translateX(0); }
  .contenido-principal { margin-left: 0 !important; }
  .pagina { padding: 16px; }
}