/**
 * Sidebar Navigation Component
 * Classic app layout with persistent sidebar
 * @version 1.0.0
 *
 * States:
 * - Expanded (default desktop): Full width with labels
 * - Collapsed (medium screens): Icons only
 * - Drawer (mobile): Hidden by default, slides in
 */

/* =========================================================================
   CSS CUSTOM PROPERTIES - Sidebar specific
   ========================================================================= */

:root {
    --sidebar-width-expanded: 240px;
    --sidebar-width-collapsed: 64px;
    --sidebar-bg: var(--color-bg-secondary);
    --sidebar-border: var(--color-border-default);
    --sidebar-text: var(--color-text-primary);
    --sidebar-text-muted: var(--color-text-muted);
    --sidebar-hover-bg: var(--color-bg-tertiary);
    --sidebar-active-bg: var(--color-bg-tertiary);
    --sidebar-active-border: var(--app-accent, var(--accent-color));
    --sidebar-transition: 250ms ease;
    --sidebar-z-index: 90;
    --sidebar-overlay-z-index: 89;
}

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

.app-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width-expanded);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    z-index: var(--sidebar-z-index);
    display: flex;
    flex-direction: column;
    transition: width var(--sidebar-transition), transform var(--sidebar-transition);
    overflow: hidden;
    /* Account for safe area on notched devices */
    padding-left: env(safe-area-inset-left, 0);
}

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

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

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    min-height: var(--size-header-height);
    border-bottom: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    color: var(--sidebar-text);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-md);
    transition: color var(--duration-fast) ease;
    overflow: hidden;
    white-space: nowrap;
}

.sidebar-brand:hover {
    color: var(--app-accent, var(--accent-color));
}

.sidebar-brand-icon {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

.sidebar-brand-text {
    opacity: 1;
    transition: opacity var(--sidebar-transition);
}

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

/* Collapse toggle button */
.sidebar-collapse-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--sidebar-text-muted);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--duration-fast) ease;
    flex-shrink: 0;
}

.sidebar-collapse-btn:hover {
    background: var(--sidebar-hover-bg);
    color: var(--sidebar-text);
}

.sidebar-collapse-btn:focus-visible {
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

.sidebar-collapse-icon {
    width: 20px;
    height: 20px;
    transition: transform var(--sidebar-transition);
}

.app-sidebar.collapsed .sidebar-collapse-icon {
    transform: rotate(180deg);
}

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

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--space-3) var(--space-2);
}

.sidebar-nav-section {
    margin-bottom: var(--space-4);
}

.sidebar-nav-label {
    display: block;
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--sidebar-text-muted);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
    overflow: hidden;
    white-space: nowrap;
    opacity: 1;
    transition: opacity var(--sidebar-transition);
}

.app-sidebar.collapsed .sidebar-nav-label {
    opacity: 0;
    height: 0;
    padding: 0;
    margin: 0;
}

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

/* =========================================================================
   SIDEBAR NAV ITEMS
   ========================================================================= */

.sidebar-nav-item {
    margin-bottom: var(--space-1);
}

.sidebar-nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--duration-fast) ease;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    min-height: 44px;
    border-left: 3px solid transparent;
}

.sidebar-nav-link:hover {
    background: var(--sidebar-hover-bg);
}

.sidebar-nav-link:focus-visible {
    outline: 2px solid var(--color-border-focus);
    outline-offset: -2px;
}

/* Active state */
.sidebar-nav-link.active,
.sidebar-nav-link[aria-current="page"] {
    background: var(--sidebar-active-bg);
    border-left-color: var(--sidebar-active-border);
    font-weight: var(--font-weight-semibold);
}

/* Nav item icon */
.sidebar-nav-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    font-size: 18px;
    flex-shrink: 0;
}

/* Nav item text */
.sidebar-nav-text {
    opacity: 1;
    transition: opacity var(--sidebar-transition);
}

.app-sidebar.collapsed .sidebar-nav-text {
    opacity: 0;
    width: 0;
}

/* Badge (for counts, etc.) */
.sidebar-nav-badge {
    margin-left: auto;
    padding: 2px 8px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    background: var(--app-accent, var(--accent-color));
    color: white;
    border-radius: var(--radius-full);
    opacity: 1;
    transition: opacity var(--sidebar-transition);
}

.app-sidebar.collapsed .sidebar-nav-badge {
    opacity: 0;
}

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

.sidebar-footer {
    padding: var(--space-3) var(--space-2);
    border-top: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.sidebar-footer-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    color: var(--sidebar-text-muted);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: all var(--duration-fast) ease;
    overflow: hidden;
    white-space: nowrap;
}

.sidebar-footer-link:hover {
    background: var(--sidebar-hover-bg);
    color: var(--sidebar-text);
}

/* =========================================================================
   MOBILE DRAWER OVERLAY
   ========================================================================= */

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--sidebar-overlay-z-index);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--sidebar-transition);
}

.sidebar-overlay.visible {
    opacity: 1;
    pointer-events: auto;
}

/* Mobile menu toggle (in header) */
.mobile-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background var(--duration-fast) ease;
}

.mobile-menu-toggle:hover {
    background: var(--bg-tertiary);
}

.mobile-menu-toggle:focus-visible {
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

.mobile-menu-icon {
    width: 24px;
    height: 24px;
}

/* =========================================================================
   TOOLTIP FOR COLLAPSED STATE
   ========================================================================= */

.app-sidebar.collapsed .sidebar-nav-link {
    position: relative;
}

.sidebar-tooltip {
    display: none;
    position: absolute;
    left: calc(100% + 8px);
    top: 50%;
    transform: translateY(-50%);
    padding: 6px 12px;
    background: var(--bg-inverse);
    color: var(--text-inverse);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-sm);
    white-space: nowrap;
    z-index: 1000;
    pointer-events: none;
    box-shadow: var(--shadow-md);
}

.sidebar-tooltip::before {
    content: '';
    position: absolute;
    left: -4px;
    top: 50%;
    transform: translateY(-50%);
    border: 4px solid transparent;
    border-right-color: var(--bg-inverse);
}

.app-sidebar.collapsed .sidebar-nav-link:hover .sidebar-tooltip,
.app-sidebar.collapsed .sidebar-nav-link:focus-visible .sidebar-tooltip {
    display: block;
}

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

/* Medium screens - collapsed by default */
@media (max-width: 1024px) and (min-width: 769px) {
    .app-sidebar {
        width: var(--sidebar-width-collapsed);
    }

    .app-sidebar .sidebar-brand-text,
    .app-sidebar .sidebar-nav-text,
    .app-sidebar .sidebar-nav-badge,
    .app-sidebar .sidebar-nav-label {
        opacity: 0;
        width: 0;
        height: auto;
    }

    .app-sidebar .sidebar-nav-label {
        height: 0;
        padding: 0;
        margin: 0;
    }

    .app-sidebar .sidebar-collapse-icon {
        transform: rotate(180deg);
    }

    /* Expand on hover for medium screens */
    .app-sidebar:hover,
    .app-sidebar:focus-within {
        width: var(--sidebar-width-expanded);
    }

    .app-sidebar:hover .sidebar-brand-text,
    .app-sidebar:focus-within .sidebar-brand-text,
    .app-sidebar:hover .sidebar-nav-text,
    .app-sidebar:focus-within .sidebar-nav-text,
    .app-sidebar:hover .sidebar-nav-badge,
    .app-sidebar:focus-within .sidebar-nav-badge,
    .app-sidebar:hover .sidebar-nav-label,
    .app-sidebar:focus-within .sidebar-nav-label {
        opacity: 1;
        width: auto;
    }

    .app-sidebar:hover .sidebar-nav-label,
    .app-sidebar:focus-within .sidebar-nav-label {
        height: auto;
        padding: var(--space-2) var(--space-3);
    }

    .app-sidebar:hover .sidebar-collapse-icon,
    .app-sidebar:focus-within .sidebar-collapse-icon {
        transform: rotate(0);
    }

    /* Hide tooltips when expanded via hover */
    .app-sidebar:hover .sidebar-tooltip,
    .app-sidebar:focus-within .sidebar-tooltip {
        display: none !important;
    }
}

/* Mobile screens - drawer mode */
@media (max-width: 768px) {
    .app-sidebar {
        transform: translateX(-100%);
        width: min(280px, calc(100vw - 60px));
        box-shadow: var(--shadow-xl);
    }

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

    .sidebar-overlay {
        display: block;
    }

    .sidebar-collapse-btn {
        display: none;
    }

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

    /* Always show text in mobile drawer */
    .app-sidebar .sidebar-brand-text,
    .app-sidebar .sidebar-nav-text,
    .app-sidebar .sidebar-nav-badge,
    .app-sidebar .sidebar-nav-label {
        opacity: 1;
        width: auto;
    }

    .app-sidebar .sidebar-nav-label {
        height: auto;
        padding: var(--space-2) var(--space-3);
    }

    /* Hide tooltips on mobile */
    .sidebar-tooltip {
        display: none !important;
    }
}

/* =========================================================================
   APP-SPECIFIC NAV ITEM COLORS
   ========================================================================= */

.sidebar-nav-link[data-app="coffee"] .sidebar-nav-icon {
    color: var(--color-brown-600);
}

.sidebar-nav-link[data-app="tea"] .sidebar-nav-icon {
    color: var(--color-green-500);
}

.sidebar-nav-link[data-app="sunlight"] .sidebar-nav-icon {
    color: var(--color-orange-500);
}

.sidebar-nav-link[data-app="data"] .sidebar-nav-icon {
    color: var(--color-blue-600);
}

/* Active state inherits app color for border */
.sidebar-nav-link[data-app="coffee"].active,
.sidebar-nav-link[data-app="coffee"][aria-current="page"] {
    border-left-color: var(--color-brown-600);
}

.sidebar-nav-link[data-app="tea"].active,
.sidebar-nav-link[data-app="tea"][aria-current="page"] {
    border-left-color: var(--color-green-500);
}

.sidebar-nav-link[data-app="sunlight"].active,
.sidebar-nav-link[data-app="sunlight"][aria-current="page"] {
    border-left-color: var(--color-orange-500);
}

.sidebar-nav-link[data-app="data"].active,
.sidebar-nav-link[data-app="data"][aria-current="page"] {
    border-left-color: var(--color-blue-600);
}

/* =========================================================================
   KEYBOARD FOCUS STYLES
   ========================================================================= */

.sidebar-nav-link:focus-visible,
.sidebar-footer-link:focus-visible,
.sidebar-brand:focus-visible {
    outline: 2px solid var(--color-border-focus);
    outline-offset: -2px;
}

/* =========================================================================
   REDUCED MOTION
   ========================================================================= */

@media (prefers-reduced-motion: reduce) {
    .app-sidebar,
    .app-sidebar *,
    .sidebar-overlay {
        transition-duration: 0.01ms !important;
    }
}