/* ============================================ */
/* LAYOUT PRINCIPAL                              */
/* ============================================ */

body {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
}

/* ============================================ */
/* SIDEBAR                                       */
/* ============================================ */

.sidebar {
  /* Fijar la columna explícita evita que aparezcan en el grid del body
     en posiciones inesperadas si se agregan hermanos (overlay de login, etc.). */
  grid-column: 1;
  grid-row: 1;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: var(--space-6) var(--space-4);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  transition: transform var(--transition-base);
}

.sidebar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0 var(--space-2);
  margin-bottom: var(--space-8);
}

.brand__logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--gradient-brand);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px -6px rgba(99, 102, 241, 0.5);
}

.brand__logo svg {
  width: 20px;
  height: 20px;
}

.brand__text {
  display: flex;
  flex-direction: column;
}

.brand__name {
  font-size: var(--font-size-md);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.brand__tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-soft);
  font-size: var(--font-size-base);
  font-weight: 500;
  width: 100%;
  text-align: left;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-item:hover {
  background: var(--color-bg-soft);
  color: var(--color-text);
}

.nav-item.active {
  background: var(--color-accent-soft);
  color: var(--color-accent-text);
  font-weight: 600;
}

.nav-item.active svg {
  color: var(--color-accent);
}

/* Badge contador (pendientes hoy/atrasadas) en el item de navegación */
.nav-item__badge {
  margin-left: auto;
  min-width: 22px;
  height: 22px;
  padding: 0 6px;
  border-radius: var(--radius-full);
  background: var(--color-warning);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.nav-item__badge.overdue {
  background: var(--color-danger);
}

.nav-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.sidebar__user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  margin-top: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-md);
  flex-shrink: 0;
}

.user-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.user-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-group {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ============================================ */
/* ÁREA PRINCIPAL                                */
/* ============================================ */

.main {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--color-bg);
}

.topbar {
  height: var(--topbar-height);
  border-bottom: 1px solid var(--color-border);
  padding: 0 var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar__menu {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

.topbar__menu:hover {
  background: var(--color-bg-soft);
}

.topbar__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  flex: 1;
}

.topbar__actions {
  display: flex;
  gap: var(--space-2);
}

/* Vistas: ocupan todo el ancho del área principal. El padding lateral
   de var(--space-8) coincide con el del topbar, así el borde izquierdo
   de cada vista queda alineado con el título y el derecho con el botón
   "+ Nueva tarea". Layout interno (1/2 columnas, grids, etc.) se decide
   en cada vista. */
.view {
  display: none;
  flex: 1;
  padding: var(--space-8);
  width: 100%;
  animation: fadeIn var(--transition-base);
}

.view.active {
  display: block;
}

/* Layout fluido de 2 columnas asimétricas. Cuando hay espacio, main y
   side conviven lado a lado; cuando no, side baja debajo de main.
   Sin breakpoints: el flex-wrap se acomoda solo por flex-basis. */
.two-cols {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  align-items: flex-start;
}

.two-cols__main { flex: 1 1 400px; min-width: 0; }
.two-cols__side { flex: 0 1 360px; min-width: 0; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================ */
/* RESPONSIVE                                    */
/* ============================================ */

@media (max-width: 768px) {
  body {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100;
    transform: translateX(-100%);
    width: 80%;
    max-width: 280px;
    box-shadow: var(--shadow-xl);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .topbar__menu {
    display: flex;
  }

  .topbar {
    padding: 0 var(--space-4);
  }

  .view {
    padding: var(--space-4);
  }
}