/**
 * Mobile Navigation Styles
 * Dedicated styles for mobile bottom navigation
 */

/* ========================================
   CSS CUSTOM PROPERTIES (CSS Variables)
   ======================================== */

:root {
    /* Mobile navigation dimensions */
    --mobile-nav-height: 4rem;
    --mobile-nav-item-size: 3rem;
    --mobile-nav-icon-size: 1.5rem;
    
    /* Colors - Light mode */
    --mobile-nav-bg: #FFFFFF;
    --mobile-nav-border: #E5E7EB;
    --mobile-nav-text: #6B7280;
    --mobile-nav-text-active: #3B82F6;
    --mobile-nav-indicator: #3B82F6;
    --mobile-nav-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --mobile-nav-transition: all 0.2s ease;
    --mobile-nav-transition-fast: all 0.1s ease;
    
    /* Safe area insets */
    --mobile-nav-safe-bottom: env(safe-area-inset-bottom, 0);
    
    /* Z-index */
    --mobile-nav-z-index: 40;
}

/* Dark mode variables */
.dark {
    --mobile-nav-bg: #1F2937;
    --mobile-nav-border: #374151;
    --mobile-nav-text: #9CA3AF;
    --mobile-nav-text-active: #60A5FA;
    --mobile-nav-indicator: #60A5FA;
    --mobile-nav-shadow: 0 -2px 10px rgba(0, 0, 0, 0.3);
}

/* ========================================
   MOBILE NAVIGATION CONTAINER
   ======================================== */

.mobile-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(var(--mobile-nav-height) + var(--mobile-nav-safe-bottom));
    background-color: var(--mobile-nav-bg);
    border-top: 1px solid var(--mobile-nav-border);
    box-shadow: var(--mobile-nav-shadow);
    z-index: var(--mobile-nav-z-index);
    padding-bottom: var(--mobile-nav-safe-bottom);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.mobile-nav.hidden {
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

/* ========================================
   MOBILE NAVIGATION GRID
   ======================================== */

.mobile-nav-grid {
    display: grid;
    height: var(--mobile-nav-height);
    align-items: center;
    gap: 0;
}

/* Dynamic grid columns */
.mobile-nav-grid.cols-1 { grid-template-columns: 1fr; }
.mobile-nav-grid.cols-2 { grid-template-columns: 1fr 1fr; }
.mobile-nav-grid.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.mobile-nav-grid.cols-4 { grid-template-columns: 1fr 1fr 1fr 1fr; }
.mobile-nav-grid.cols-5 { grid-template-columns: 1fr 1fr 1fr 1fr 1fr; }
.mobile-nav-grid.cols-6 { grid-template-columns: 1fr 1fr 1fr 1fr 1fr 1fr; }

/* ========================================
   MOBILE NAVIGATION ITEMS
   ======================================== */

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    color: var(--mobile-nav-text);
    text-decoration: none;
    transition: var(--mobile-nav-transition);
    position: relative;
    min-height: var(--mobile-nav-item-size);
    border-radius: 0.5rem;
    margin: 0.25rem;
}

.mobile-nav-item:hover {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--mobile-nav-text-active);
}

.mobile-nav-item:focus {
    outline: 2px solid var(--mobile-nav-text-active);
    outline-offset: 2px;
}

.mobile-nav-item.active {
    color: var(--mobile-nav-text-active);
}

/* ========================================
   MOBILE NAVIGATION ICONS
   ======================================== */

.mobile-nav-icon {
    font-size: var(--mobile-nav-icon-size);
    line-height: 1;
    margin-bottom: 0.25rem;
    transition: var(--mobile-nav-transition);
}

.mobile-nav-item:hover .mobile-nav-icon {
    transform: scale(1.1);
}

.mobile-nav-item.active .mobile-nav-icon {
    transform: scale(1.1);
}

/* ========================================
   MOBILE NAVIGATION LABELS
   ======================================== */

.mobile-nav-label {
    font-size: 0.75rem;
    line-height: 1;
    font-weight: 500;
    text-align: center;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: var(--mobile-nav-transition);
}

.mobile-nav-item:hover .mobile-nav-label {
    color: var(--mobile-nav-text-active);
}

/* Hide labels when disabled */
.mobile-nav.no-labels .mobile-nav-label {
    display: none;
}

.mobile-nav.no-labels .mobile-nav-item {
    padding: 0.75rem;
}

.mobile-nav.no-labels .mobile-nav-icon {
    margin-bottom: 0;
    font-size: 1.75rem;
}

/* ========================================
   ACTIVE INDICATOR
   ======================================== */

.mobile-nav-indicator {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2rem;
    height: 2px;
    background-color: var(--mobile-nav-indicator);
    border-radius: 0 0 2px 2px;
    opacity: 0;
    transition: var(--mobile-nav-transition);
}

.mobile-nav-item.active .mobile-nav-indicator {
    opacity: 1;
}

/* Alternative bottom indicator */
.mobile-nav-indicator.bottom {
    top: auto;
    bottom: 0;
    border-radius: 2px 2px 0 0;
}

/* ========================================
   TOUCH FEEDBACK
   ======================================== */

.mobile-nav-item {
    -webkit-tap-highlight-color: rgba(59, 130, 246, 0.1);
    tap-highlight-color: rgba(59, 130, 246, 0.1);
}

.mobile-nav-item:active {
    transform: scale(0.95);
    transition: var(--mobile-nav-transition-fast);
}

/* ========================================
   LOADING STATE
   ======================================== */

.mobile-nav-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: var(--mobile-nav-height);
    color: var(--mobile-nav-text);
}

.mobile-nav-spinner {
    width: 1.5rem;
    height: 1.5rem;
    border: 2px solid var(--mobile-nav-border);
    border-top: 2px solid var(--mobile-nav-text-active);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ========================================
   CUSTOMIZE BUTTON
   ======================================== */

.mobile-nav-customize {
    position: absolute;
    bottom: calc(var(--mobile-nav-height) + var(--mobile-nav-safe-bottom) + 1rem);
    right: 1rem;
    width: 3rem;
    height: 3rem;
    background-color: var(--mobile-nav-text-active);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
    transition: var(--mobile-nav-transition);
    z-index: calc(var(--mobile-nav-z-index) + 1);
    opacity: 0;
    transform: scale(0.8);
}

.mobile-nav-customize.visible {
    opacity: 1;
    transform: scale(1);
}

.mobile-nav-customize:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.mobile-nav-customize:active {
    transform: scale(0.95);
}

/* ========================================
   NOTIFICATION BADGES
   ======================================== */

.mobile-nav-badge {
    position: absolute;
    top: 0.25rem;
    right: 0.25rem;
    min-width: 1.25rem;
    height: 1.25rem;
    background-color: #EF4444;
    color: white;
    border-radius: 0.625rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.625rem;
    font-weight: 600;
    line-height: 1;
    padding: 0 0.25rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* ========================================
   HAPTIC FEEDBACK SUPPORT
   ======================================== */

.mobile-nav-item[data-haptic="true"] {
    /* Styles for items with haptic feedback */
}

/* ========================================
   RESPONSIVE ADJUSTMENTS
   ======================================== */

/* Small screens */
@media (max-width: 375px) {
    .mobile-nav-label {
        font-size: 0.625rem;
    }
    
    .mobile-nav-icon {
        font-size: 1.25rem;
    }
    
    .mobile-nav-item {
        padding: 0.375rem;
    }
}

/* Large mobile screens */
@media (min-width: 414px) and (max-width: 1023px) {
    .mobile-nav-item {
        padding: 0.625rem;
    }
    
    .mobile-nav-icon {
        font-size: 1.75rem;
    }
}

/* Hide on desktop */
@media (min-width: 1024px) {
    .mobile-nav {
        display: none;
    }
}

/* ========================================
   ACCESSIBILITY ENHANCEMENTS
   ======================================== */

@media (prefers-reduced-motion: reduce) {
    .mobile-nav-item,
    .mobile-nav-icon,
    .mobile-nav-label,
    .mobile-nav-indicator,
    .mobile-nav-customize {
        transition: none;
    }
    
    .mobile-nav-spinner {
        animation: none;
    }
    
    .mobile-nav-badge {
        animation: none;
    }
}

@media (prefers-contrast: high) {
    .mobile-nav {
        border-top-width: 2px;
    }
    
    .mobile-nav-indicator {
        height: 3px;
    }
    
    .mobile-nav-badge {
        border: 1px solid white;
    }
}

/* ========================================
   DARK MODE SPECIFIC ADJUSTMENTS
   ======================================== */

.dark .mobile-nav {
    background-color: rgba(31, 41, 55, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.dark .mobile-nav-customize {
    background-color: #60A5FA;
    box-shadow: 0 4px 12px rgba(96, 165, 250, 0.3);
}

.dark .mobile-nav-customize:hover {
    box-shadow: 0 6px 20px rgba(96, 165, 250, 0.4);
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
    .mobile-nav,
    .mobile-nav-customize {
        display: none;
    }
}