/* ========================================
   FNL Budgets — Sidebar Layout System
   ======================================== */

:root {
    --sidebar-width: 250px;
    --sidebar-collapsed-width: 64px;
    --topbar-height: 52px;
}

/* ---- Sidebar ---- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    z-index: 1040;
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--bs-body-bg);
    border-right: 1px solid var(--bs-border-color);
    display: flex;
    flex-direction: column;
    transition: width 0.2s ease, transform 0.2s ease;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    height: var(--topbar-height);
    padding: 0 1rem;
    border-bottom: 1px solid var(--bs-border-color);
    flex-shrink: 0;
}

.sidebar-brand a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--bs-primary);
    font-weight: 700;
    font-size: 1.1rem;
}

.sidebar-brand i {
    font-size: 1.4rem;
}

.sidebar-nav {
    flex: 1;
    padding: 0.5rem 0;
    overflow-y: auto;
}

.sidebar-section-label {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--bs-secondary);
    padding: 1.25rem 1rem 0.375rem;
    user-select: none;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    margin: 1px 0.5rem;
    border-radius: 0.5rem;
    color: var(--bs-body-color);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: background 0.15s ease, color 0.15s ease;
    white-space: nowrap;
}

.sidebar-link i {
    font-size: 1.1rem;
    width: 1.25rem;
    text-align: center;
    flex-shrink: 0;
    opacity: 0.7;
}

.sidebar-link:hover {
    background: var(--bs-primary-bg-subtle, rgba(var(--bs-primary-rgb), 0.1));
    color: var(--bs-primary);
    text-decoration: none;
}

.sidebar-link:hover i {
    opacity: 1;
}

.sidebar-link.active {
    background: var(--bs-primary);
    color: #fff;
}

.sidebar-link.active i {
    opacity: 1;
}

.sidebar-footer {
    padding: 0.5rem 0;
    border-top: 1px solid var(--bs-border-color);
    flex-shrink: 0;
}

/* Collapsed sidebar (desktop) */
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .sidebar-brand-text,
.sidebar.collapsed .sidebar-section-label,
.sidebar.collapsed .sidebar-link span {
    display: none;
}

.sidebar.collapsed .sidebar-brand a {
    justify-content: center;
}

.sidebar.collapsed .sidebar-link {
    justify-content: center;
    padding: 0.625rem;
    margin: 1px 0.375rem;
}

.sidebar.collapsed .sidebar-link i {
    font-size: 1.25rem;
}

/* Tooltip on collapsed sidebar links */
.sidebar.collapsed .sidebar-link {
    position: relative;
}

.sidebar.collapsed .sidebar-link::after {
    content: attr(data-title);
    position: absolute;
    left: calc(100% + 8px);
    top: 50%;
    transform: translateY(-50%);
    background: var(--bs-dark);
    color: #fff;
    padding: 0.25rem 0.625rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
    z-index: 1050;
}

.sidebar.collapsed .sidebar-link:hover::after {
    opacity: 1;
}

/* ---- Top Bar ---- */
.topbar {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: var(--topbar-height);
    z-index: 1030;
    background: var(--bs-body-bg);
    border-bottom: 1px solid var(--bs-border-color);
    display: flex;
    align-items: center;
    padding: 0 1rem;
    gap: 0.75rem;
    transition: left 0.2s ease;
}

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

.topbar-toggle {
    background: none;
    border: none;
    font-size: 1.25rem;
    padding: 0.25rem 0.375rem;
    color: var(--bs-body-color);
    cursor: pointer;
    border-radius: 0.375rem;
    line-height: 1;
}

.topbar-toggle:hover {
    background: var(--bs-secondary-bg);
}

.topbar-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.topbar-left {
    flex: 1;
    min-width: 0;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.topbar-btn {
    background: none;
    border: none;
    padding: 0.375rem 0.5rem;
    color: var(--bs-body-color);
    cursor: pointer;
    border-radius: 0.375rem;
    font-size: 1.1rem;
    line-height: 1;
    position: relative;
}

.topbar-btn:hover {
    background: var(--bs-secondary-bg);
}

.topbar-user-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: 1px solid var(--bs-border-color);
    padding: 0.25rem 0.75rem 0.25rem 0.25rem;
    border-radius: 2rem;
    color: var(--bs-body-color);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: border-color 0.15s;
}

.topbar-user-btn:hover {
    border-color: var(--bs-primary);
}

.topbar-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--bs-primary);
    color: #fff;
    font-weight: 600;
    font-size: 0.8rem;
}

.cmd-k-hint {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bs-secondary-bg);
    border: 1px solid var(--bs-border-color);
    padding: 0.25rem 0.75rem;
    border-radius: 0.5rem;
    color: var(--bs-secondary-color);
    cursor: pointer;
    font-size: 0.8rem;
    transition: border-color 0.15s;
}

.cmd-k-hint:hover {
    border-color: var(--bs-primary);
}

.cmd-k-hint kbd {
    background: var(--bs-body-bg);
    border: 1px solid var(--bs-border-color);
    border-radius: 0.25rem;
    padding: 0 0.375rem;
    font-size: 0.7rem;
    font-family: inherit;
}

/* ---- Main Content ---- */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--topbar-height);
    min-height: calc(100vh - var(--topbar-height));
    padding: 1.5rem;
    transition: margin-left 0.2s ease;
    display: flex;
    flex-direction: column;
}

.main-content.sidebar-collapsed {
    margin-left: var(--sidebar-collapsed-width);
}

.main-content > main {
    flex: 1;
}

.main-footer {
    padding: 1rem 0;
    margin-top: 2rem;
    border-top: 1px solid var(--bs-border-color);
    font-size: 0.8rem;
}

/* ---- Mobile Overlay ---- */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1035;
    backdrop-filter: blur(2px);
}

.sidebar-overlay.show {
    display: block;
}

/* ---- Responsive ---- */
@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.show {
        transform: translateX(0);
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15);
    }

    .topbar {
        left: 0;
    }

    .main-content {
        margin-left: 0;
        padding: 1rem;
    }
}

/* ---- Notification dropdown ---- */
.notification-dropdown {
    padding: 0;
}

/* ---- Scrollbar styling ---- */
.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--bs-border-color);
    border-radius: 2px;
}

/* ---- Dark mode refinements ---- */
[data-bs-theme="dark"] .sidebar {
    border-right-color: rgba(255, 255, 255, 0.08);
}

[data-bs-theme="dark"] .topbar {
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

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

[data-bs-theme="dark"] .sidebar-overlay.show {
    background: rgba(0, 0, 0, 0.6);
}

[data-bs-theme="dark"] .sidebar.collapsed .sidebar-link::after {
    background: var(--bs-light);
    color: var(--bs-dark);
}

/* ---- Print: hide sidebar/topbar ---- */
@media print {
    .sidebar,
    .topbar,
    .sidebar-overlay {
        display: none !important;
    }

    .main-content {
        margin: 0 !important;
        padding: 0 !important;
    }
}