/* ===== Sidebar Collapsible Navigation ===== */

:root {
    --sb-width: 260px;
    --sb-collapsed-width: 64px;
    --sb-bg: var(--bg-secondary, #f8f9fa);
    --sb-border: var(--border-color, #dee2e6);
    --sb-text: var(--text-primary, #1a1a2e);
    --sb-text-dim: var(--text-secondary, #6b7280);
    --sb-hover: var(--bg-tertiary, #e9ecef);
    --sb-active: var(--accent-color, #4f46e5);
    --sb-active-bg: rgba(79, 70, 229, 0.08);
    --sb-submenu-bg: rgba(0, 0, 0, 0.02);
    --sb-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode overrides */
@media (prefers-color-scheme: dark) {
    :root {
        --sb-bg: var(--bg-secondary, #1e1e2e);
        --sb-border: var(--border-color, #2d2d3d);
        --sb-text: var(--text-primary, #e0e0e0);
        --sb-text-dim: var(--text-secondary, #8b8b9e);
        --sb-hover: var(--bg-tertiary, #2a2a3a);
        --sb-active-bg: rgba(79, 70, 229, 0.15);
        --sb-submenu-bg: rgba(255, 255, 255, 0.02);
    }
}
[data-theme="dark"] {
    --sb-bg: var(--bg-secondary, #1e1e2e);
    --sb-border: var(--border-color, #2d2d3d);
    --sb-text: var(--text-primary, #e0e0e0);
    --sb-text-dim: var(--text-secondary, #8b8b9e);
    --sb-hover: var(--bg-tertiary, #2a2a3a);
    --sb-active-bg: rgba(79, 70, 229, 0.15);
    --sb-submenu-bg: rgba(255, 255, 255, 0.02);
}

/* ===== App Shell Layout ===== */
.app-shell {
    display: flex;
    min-height: 100vh;
}

.app-main {
    flex: 1;
    min-width: 0;
    margin-left: var(--sb-width);
    transition: margin-left var(--sb-transition);
}

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

/* ===== Sidebar Container ===== */
/* Allow flyout to escape when collapsed */
body.sidebar-collapsed {
    overflow-x: visible !important;
}

.sidebar-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sb-width);
    height: 100vh;
    background: var(--sb-bg);
    border-right: 1px solid var(--sb-border);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    overflow: visible;
    transition: width var(--sb-transition);
}

/* Clip overflow when expanded */
body:not(.sidebar-collapsed) .sidebar-nav {
    overflow: hidden;
}

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

/* ===== Brand ===== */
.sb-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 14px;
    border-bottom: 1px solid var(--sb-border);
    white-space: nowrap;
    overflow: hidden;
}

.sb-brand-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 32px;
    text-align: center;
}

.sb-brand-text {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--sb-text);
    transition: opacity var(--sb-transition);
}

.sidebar-collapsed .sb-brand-text {
    opacity: 0;
    width: 0;
}

/* ===== Menu ===== */
.sb-menu {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 8px 0;
    scrollbar-width: thin;
}

.sidebar-collapsed .sb-menu {
    overflow: visible;
}

.sb-menu::-webkit-scrollbar {
    width: 4px;
}

.sb-menu::-webkit-scrollbar-thumb {
    background: var(--sb-border);
    border-radius: 2px;
}

/* ===== Links ===== */
.sb-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    color: var(--sb-text-dim);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    transition: background var(--sb-transition), color var(--sb-transition);
    position: relative;
}

.sb-link:hover {
    background: var(--sb-hover);
    color: var(--sb-text);
}

.sb-link.active {
    color: var(--sb-active);
    background: var(--sb-active-bg);
    font-weight: 600;
}

.sb-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 4px;
    width: 3px;
    background: var(--sb-active);
    border-radius: 0 3px 3px 0;
}

/* ===== Icons ===== */
.sb-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
    width: 36px;
    min-width: 36px;
    text-align: center;
    line-height: 1;
}

.sb-label {
    transition: opacity var(--sb-transition);
    overflow: hidden;
}

/* Hide labels in collapsed sidebar, but NOT in flyout submenus */
.sidebar-collapsed .sb-link:not(.sb-child) .sb-label {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

/* Flyout submenu labels should be visible */
.sidebar-collapsed .sb-submenu .sb-label {
    opacity: 1 !important;
    width: auto !important;
    overflow: visible !important;
}

.sidebar-collapsed .sb-link {
    justify-content: center;
    padding: 12px 0;
    overflow: visible;
    pointer-events: auto;
    z-index: 10;
}

.sidebar-collapsed .sb-brand {
    justify-content: center;
    padding: 16px 0;
}

.sidebar-collapsed .sb-brand-icon {
    margin: 0;
}

/* ===== Arrow ===== */
.sb-arrow {
    margin-left: auto;
    font-size: 0.9rem;
    flex-shrink: 0;
    transition: transform var(--sb-transition), opacity var(--sb-transition);
    color: var(--sb-text-dim);
}

.sb-group.open > .sb-toggle .sb-arrow {
    transform: rotate(90deg);
}

.sidebar-collapsed .sb-arrow {
    opacity: 0;
    width: 0;
}

/* Collapsed: submenu as flyout popup */
.sidebar-collapsed .sb-group .sb-submenu {
    max-height: 0;
    overflow: hidden;
    position: absolute;
    left: var(--sb-collapsed-width);
    top: 0;
    width: 220px;
    background: var(--sb-bg);
    border: 2px solid var(--sb-active, #4f46e5);
    border-radius: 0 10px 10px 0;
    box-shadow: 4px 4px 20px rgba(0,0,0,0.25);
    z-index: 9999;
    padding: 0;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, max-height 0s;
}

.sidebar-collapsed .sb-group {
    position: relative;
}

.sidebar-collapsed .sb-group.open > .sb-submenu,
.sidebar-collapsed .sb-group:hover > .sb-submenu {
    max-height: 500px;
    opacity: 1;
    pointer-events: auto;
    padding: 6px 0;
}

.sidebar-collapsed .sb-group .sb-submenu .sb-child {
    padding: 10px 16px !important;
    font-size: 0.875rem;
    color: var(--sb-text);
    font-weight: 500;
}

.sidebar-collapsed .sb-group .sb-submenu .sb-child:hover {
    background: var(--sb-active-bg);
    color: var(--sb-active);
}

.sidebar-collapsed .sb-group .sb-submenu .sb-child::before {
    display: none;
}

.sidebar-collapsed .sb-footer {
    padding: 8px 0;
    width: var(--sb-collapsed-width);
    box-sizing: border-box;
}

.sidebar-collapsed .sb-collapse-btn {
    justify-content: center;
    padding: 8px 0;
    overflow: visible;
    width: var(--sb-collapsed-width);
    box-sizing: border-box;
}

.sidebar-collapsed .sb-collapse-btn .sb-label {
    display: none;
}

/* ===== Submenu ===== */
.sb-submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: var(--sb-submenu-bg);
}

.sb-group.open > .sb-submenu {
    max-height: 500px;
}

.sb-child {
    padding-left: 56px !important;
    font-size: 0.825rem;
    font-weight: 400;
}

.sb-child::before {
    content: '';
    position: absolute;
    left: 36px;
    top: 50%;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--sb-border);
    transform: translateY(-50%);
    transition: background var(--sb-transition);
}

.sb-child.active::before {
    background: var(--sb-active);
}

.sb-child:hover::before {
    background: var(--sb-text-dim);
}

/* ===== Footer ===== */
.sb-footer {
    border-top: 1px solid var(--sb-border);
    padding: 8px;
}

.sb-footer-actions {
    display: flex;
    gap: 4px;
    justify-content: center;
    padding: 4px 0;
}

.sb-footer-actions .theme-btn {
    padding: 8px;
    border-radius: var(--radius-sm, 0.5rem);
}

.sb-logout-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 8px;
    border: none;
    background: none;
    color: var(--sb-text-dim);
    font-size: 0.8rem;
    cursor: pointer;
    border-radius: var(--radius-sm, 0.5rem);
    transition: background var(--sb-transition);
    white-space: nowrap;
    overflow: hidden;
}

.sb-logout-btn:hover {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

.sidebar-collapsed .sb-logout-btn .sb-label {
    display: none;
}

.sidebar-collapsed .sb-logout-btn {
    justify-content: center;
    padding: 8px 0;
    width: var(--sb-collapsed-width);
    box-sizing: border-box;
}

.sb-collapse-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 8px;
    border: none;
    background: none;
    color: var(--sb-text-dim);
    font-size: 0.8rem;
    cursor: pointer;
    border-radius: var(--radius-sm, 0.5rem);
    transition: background var(--sb-transition);
    white-space: nowrap;
    overflow: hidden;
}

.sb-collapse-btn:hover {
    background: var(--sb-hover);
}

.sb-collapse-icon {
    font-size: 1rem;
    flex-shrink: 0;
}

/* ===== Collapsed Tooltips ===== */
.sidebar-collapsed .sb-link[data-tooltip] {
    position: relative;
}

.sidebar-collapsed .sb-link[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    left: calc(var(--sb-collapsed-width) + 8px);
    top: 50%;
    transform: translateY(-50%);
    background: var(--sb-text);
    color: var(--sb-bg);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    white-space: nowrap;
    z-index: 9999;
    pointer-events: none;
    opacity: 0;
    animation: tooltipIn 0.15s ease forwards;
}

@keyframes tooltipIn {
    to { opacity: 1; }
}

/* ===== Mobile ===== */
.sb-topbar-mobile {
    display: none;
}

.sb-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    border: none;
    background: none;
    cursor: pointer;
}

.sb-mobile-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--sb-text);
    border-radius: 2px;
    transition: transform 0.2s;
}

.sb-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 999;
    border: none;
    cursor: pointer;
}

@media (max-width: 767px) {
    .sb-topbar-mobile {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 10px 16px;
        background: var(--sb-bg);
        border-bottom: 1px solid var(--sb-border);
        position: sticky;
        top: 0;
        z-index: 100;
    }

    .sb-topbar-title {
        font-weight: 600;
        font-size: 0.95rem;
        color: var(--sb-text);
    }

    .sb-mobile-toggle {
        display: flex;
    }

    .app-main {
        margin-left: 0 !important;
    }

    .sidebar-nav {
        transform: translateX(-100%);
        width: var(--sb-width) !important;
        transition: transform var(--sb-transition);
    }

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

    .sidebar-open .sb-overlay {
        display: block;
    }

    .sidebar-scroll-lock {
        overflow: hidden;
    }

    /* Hide collapse button on mobile */
    .sb-collapse-btn {
        display: none;
    }

    /* Always show labels on mobile */
    .sb-label, .sb-brand-text, .sb-arrow {
        opacity: 1 !important;
        width: auto !important;
    }
}

/* ===== Hide old navbar (backwards compat) ===== */
nav.navbar {
    display: none !important;
}