/* ===== Navigation System ===== */

/* ===== Bottom Navigation Bar (Mobile) ===== */
.app-navigation {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--nav-height-mobile);
    background-color: var(--md-sys-color-surface);
    box-shadow: 0 -2px 4px 0 rgba(0,0,0,0.1);
    z-index: var(--z-sticky);
    padding: 0;
    transition: none;
}

.app-navigation.hidden {
    transform: translateY(100%);
        display: none;
}

.bottom-nav {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8px;
    max-width: 100%;
    margin: 0;
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xxs);
    height: 100%;
    padding: var(--spacing-xs) 0;
    background: transparent;
    border: none;
    color: var(--md-sys-color-on-surface-variant);
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    text-decoration: none;
    -webkit-tap-highlight-color: transparent;
}

.nav-item:hover {
    background-color: rgba(var(--md-sys-color-primary-rgb), 0.08);
}

.nav-item:active {
    background-color: rgba(var(--md-sys-color-primary-rgb), 0.12);
}

.nav-item .material-icons-round {
    font-size: 24px;
    transition: var(--transition-fast);
}

.nav-label {
    font: var(--md-sys-typescale-label-small);
    transition: var(--transition-fast);
}

/* Active State */
.nav-item.active {
    color: var(--md-sys-color-primary);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    top: var(--spacing-xs);
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 32px;
    background-color: var(--md-sys-color-primary-container);
    border-radius: var(--radius-full);
    z-index: -1;
    animation: navActiveIndicator var(--duration-medium2) var(--easing-emphasized);
}

@keyframes navActiveIndicator {
    from {
        width: 32px;
        opacity: 0;
    }
    to {
        width: 48px;
        opacity: 1;
    }
}

/* Badge on nav item */
.nav-item .nav-badge {
    position: absolute;
    top: var(--spacing-xs);
    right: calc(50% - 16px);
    min-width: 18px;
    height: 18px;
    padding: 0 4px;
    background-color: var(--md-sys-color-error);
    color: var(--md-sys-color-on-error);
    border-radius: var(--radius-full);
    font: 700 10px/18px 'Tajawal', sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== Side Navigation (Tablet/Desktop) ===== */

.side-nav {
    position: fixed;
    top: var(--header-height);
    right: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background-color: var(--md-sys-color-surface);
    box-shadow: var(--md-sys-elevation-1);
    transform: translateX(100%);
    transition: none;
    z-index: var(--z-fixed);
    overflow-y: auto;
    display: none;
}

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

.side-nav-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.side-nav-list {
    padding: var(--spacing-sm) 0;
}

.side-nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    min-height: 56px;
    color: var(--md-sys-color-on-surface);
    text-decoration: none;
    transition: var(--transition-fast);
    cursor: pointer;
    position: relative;
}

.side-nav-item:hover {
    background-color: rgba(var(--md-sys-color-primary-rgb), 0.08);
}

.side-nav-item.active {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
}

.side-nav-item.active::before {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background-color: var(--md-sys-color-primary);
    border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
}

.side-nav-icon {
    font-size: 24px;
    width: 24px;
}

.side-nav-label {
    flex: 1;
    font: var(--md-sys-typescale-label-large);
}

.side-nav-divider {
    margin: var(--spacing-sm) var(--spacing-lg);
    height: 1px;
    background-color: var(--md-sys-color-outline-variant);
}

/* ===== Navigation Backdrop ===== */
.nav-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: none;
    z-index: var(--z-modal-backdrop);
}

.nav-backdrop.show {
    opacity: 1;
    visibility: visible;
}

/* ===== Breadcrumbs ===== */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    font: var(--md-sys-typescale-body-small);
    color: var(--md-sys-color-on-surface-variant);
    overflow-x: auto;
    white-space: nowrap;
}

.breadcrumbs::-webkit-scrollbar {
    display: none;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: inherit;
    text-decoration: none;
    transition: var(--transition-fast);
}

.breadcrumb-item:hover {
    color: var(--md-sys-color-primary);
}

.breadcrumb-separator {
    color: var(--md-sys-color-outline);
    user-select: none;
}

.breadcrumb-item:last-child {
    color: var(--md-sys-color-on-surface);
    font-weight: 500;
    pointer-events: none;
}

/* ===== Tabs ===== */
.tabs {
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
    overflow-x: auto;
    position: relative;
}

.tabs::-webkit-scrollbar {
    display: none;
}

.tab {
    flex: 1;
    min-width: 90px;
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: none;
    color: var(--md-sys-color-on-surface-variant);
    font: var(--md-sys-typescale-title-small);
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    white-space: nowrap;
}

.tab:hover {
    background-color: rgba(var(--md-sys-color-primary-rgb), 0.08);
    color: var(--md-sys-color-primary);
}

.tab.active {
    color: var(--md-sys-color-primary);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--md-sys-color-primary);
    border-radius: var(--radius-xs) var(--radius-xs) 0 0;
    animation: tabIndicator var(--duration-medium2) var(--easing-emphasized);
}

@keyframes tabIndicator {
    from {
        transform: scaleX(0);
    }
    to {
        transform: scaleX(1);
    }
}

.tab-icon {
    margin-left: var(--spacing-xs);
}

/* ===== Responsive Adjustments ===== */
@media (min-width: 600px) {
    .app-navigation {
        height: var(--nav-height);
    }
    
    .nav-item .material-icons-round {
        font-size: 26px;
    }
    
    .nav-label {
        font: var(--md-sys-typescale-label-medium);
    }
}

@media (min-width: 840px) {
    /* Hide bottom nav on desktop */
    .app-navigation {
        display: none;
    }
    
    /* Show side nav on desktop */
    .side-nav {
        display: block;
        position: static;
        transform: none;
        box-shadow: none;
        border-left: 1px solid var(--md-sys-color-outline-variant);
    }
    
    /* Adjust main content for side nav */
    .app-main {
        margin-right: var(--sidebar-width);
    }
    
    .app-main.full-width {
        margin-right: 0;
    }
    
    /* Navigation Rail (Collapsed state) */
    .side-nav.collapsed {
        width: var(--sidebar-width-collapsed);
    }
    
    .side-nav.collapsed .side-nav-label,
    .side-nav.collapsed .side-nav-header {
        display: none;
    }
    
    .side-nav.collapsed .side-nav-item {
        justify-content: center;
        padding: var(--spacing-sm);
    }
    
    .app-main.nav-collapsed {
        margin-right: var(--sidebar-width-collapsed);
    }
}

/* ===== Animation Classes ===== */
.nav-slide-up {
    animation: slideUp var(--duration-medium2) var(--easing-emphasized);
}

.nav-slide-down {
    animation: slideDown var(--duration-medium2) var(--easing-emphasized);
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        transform: translateY(0);
    }
    to {
        transform: translateY(100%);
    }
}

/* ===== Dark Mode Support (if needed) ===== */
@media (prefers-color-scheme: dark) {
    .app-navigation {
        background-color: #1e1e1e;
        box-shadow: 0 -2px 4px 0 rgba(0,0,0,0.3);
    }
    
    .side-nav {
        background-color: #1e1e1e;
    }
}