/* ==========================================================================
   Layout general: sidebar + topbar
   ========================================================================== */

:root {
    --sidebar-width: 260px;
    --sidebar-width-collapsed: 72px;
    --topbar-height: 60px;
}

.app-shell {
    display: flex;
    min-height: 100vh;
}

.app-main {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    min-width: 0;
}

.app-topbar {
    position: sticky;
    top: 0;
    z-index: 1020;
}

.app-topbar .navbar {
    height: var(--topbar-height);
    border-bottom: 1px solid var(--bs-border-color);
}

.app-topbar .nav-link,
.app-topbar .topbar-user-toggle {
    color: var(--bs-body-color);
}

.app-topbar .btn-icon {
    background-color: transparent;
    border: none;
    color: var(--bs-body-color);
}

.app-topbar .btn-icon:hover {
    background-color: var(--bs-tertiary-bg);
    color: var(--bs-body-color);
}

/* ==========================================================================
   Sidebar
   ========================================================================== */

.app-sidebar {
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    width: var(--sidebar-width);
    background-color: var(--bs-body-bg);
    border-right: 1px solid var(--bs-border-color);
    transition: width 0.2s ease-in-out;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    height: var(--topbar-height);
    padding: 0 1.25rem;
    font-weight: 600;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--bs-border-color);
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-header .bi-hdd-network {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.sidebar-nav {
    flex: 1 1 auto;
    overflow-y: auto;
    padding: 0.75rem 0;
}

.sidebar-section + .sidebar-section {
    margin-top: 0.5rem;
}

.sidebar-section-header {
    display: flex;
    align-items: center;
    width: 100%;
    border: none;
    background: transparent;
    padding: 0.4rem 1.25rem;
    color: var(--bs-secondary-color);
    text-transform: uppercase;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.sidebar-section-title {
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-section-chevron {
    margin-left: auto;
    transition: transform 0.15s ease-in-out;
    flex-shrink: 0;
}

.sidebar-section.collapsed .sidebar-section-chevron {
    transform: rotate(-90deg);
}

.sidebar-section.collapsed .sidebar-section-items {
    display: none;
}

.sidebar-section-items {
    list-style: none;
    margin: 0;
    padding: 0;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.55rem 1.25rem;
    color: var(--bs-body-color);
    text-decoration: none;
    font-size: 0.9rem;
    white-space: nowrap;
    border-left: 3px solid transparent;
}

.sidebar-link .bi {
    font-size: 1rem;
    flex-shrink: 0;
    width: 1.1rem;
    text-align: center;
}

.sidebar-link:hover {
    background-color: var(--bs-tertiary-bg);
    color: var(--bs-body-color);
}

.sidebar-link.active {
    background-color: var(--bs-tertiary-bg);
    border-left-color: var(--bs-primary);
    font-weight: 600;
}

.sidebar-collapse-toggle {
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border: none;
    border-top: 1px solid var(--bs-border-color);
    background: transparent;
    color: var(--bs-secondary-color);
    padding: 0.6rem;
}

.sidebar-collapse-toggle:hover {
    background-color: var(--bs-tertiary-bg);
}

/* ==========================================================================
   Sidebar colapsado (modo solo íconos, escritorio)
   ========================================================================== */

.app-sidebar.sidebar-collapsed {
    width: var(--sidebar-width-collapsed);
}

.app-sidebar.sidebar-collapsed .sidebar-brand-text,
.app-sidebar.sidebar-collapsed .sidebar-section-title,
.app-sidebar.sidebar-collapsed .sidebar-section-chevron,
.app-sidebar.sidebar-collapsed .sidebar-link-text {
    display: none;
}

.app-sidebar.sidebar-collapsed .sidebar-header {
    justify-content: center;
    padding: 0;
}

.app-sidebar.sidebar-collapsed .sidebar-section-header {
    justify-content: center;
    padding: 0.4rem;
}

.app-sidebar.sidebar-collapsed .sidebar-link {
    justify-content: center;
    padding: 0.55rem 0;
    border-left: none;
}

.app-sidebar.sidebar-collapsed .sidebar-collapse-toggle .bi::before {
    content: "\f231"; /* bi-chevron-right */
}

/* ==========================================================================
   Tema oscuro — ajustes finos que Bootstrap no cubre
   ========================================================================== */

[data-bs-theme="dark"] .app-sidebar {
    background-color: var(--bs-tertiary-bg);
}

[data-bs-theme="dark"] .sidebar-link.active {
    background-color: rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   Responsive (móvil)
   ========================================================================== */

@media (max-width: 991.98px) {
    .app-sidebar {
        width: min(var(--sidebar-width), 85vw);
    }
}