/**
 * COGNO SOLUTION - Mobile Navigation CSS
 * Shared styles for mobile-first navigation with bottom nav
 */

/* ============================================================
   CSS VARIABLES
   ============================================================ */
:root {
    --mobile-header-height: 56px;
    --mobile-nav-height: 64px;
    --mobile-safe-area-bottom: env(safe-area-inset-bottom, 0px);

    /* Colors */
    --nav-bg: #ffffff;
    --nav-border: #e5e7eb;
    --nav-text: #6b7280;
    --nav-active: #3b82f6;
    --nav-active-bg: rgba(59, 130, 246, 0.1);

    /* Dark mode colors */
    --dark-nav-bg: #1f2937;
    --dark-nav-border: #374151;
    --dark-nav-text: #9ca3af;
}

/* ============================================================
   MOBILE HEADER
   ============================================================ */
.mobile-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--mobile-header-height);
    background: var(--nav-bg);
    border-bottom: 1px solid var(--nav-border);
    display: flex;
    align-items: center;
    padding: 0 1rem;
    gap: 0.75rem;
    z-index: 100;
}

.dark-mode .mobile-header {
    background: var(--dark-nav-bg);
    border-color: var(--dark-nav-border);
}

.mobile-header .back-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--nav-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: background 0.2s;
}

.mobile-header .back-btn:hover {
    background: var(--nav-active-bg);
    color: var(--nav-active);
}

.dark-mode .mobile-header .back-btn {
    color: var(--dark-nav-text);
}

.mobile-header .page-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1f2937;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 0;
}

.dark-mode .mobile-header .page-title {
    color: #f3f4f6;
}

.mobile-header .header-actions {
    display: flex;
    gap: 0.5rem;
}

.mobile-header .header-action-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--nav-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    position: relative;
}

.mobile-header .header-action-btn:hover {
    background: var(--nav-active-bg);
    color: var(--nav-active);
}

.mobile-header .badge {
    position: absolute;
    top: 4px;
    right: 4px;
    min-width: 18px;
    height: 18px;
    background: #ef4444;
    color: white;
    border-radius: 9px;
    font-size: 0.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

/* Breadcrumb in mobile header (optional use) */
.mobile-header .breadcrumb {
    font-size: 0.85rem;
    color: var(--nav-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.mobile-header .breadcrumb span {
    opacity: 0.5;
}

/* ============================================================
   MOBILE CONTENT AREA
   ============================================================ */
.mobile-content {
    padding-top: var(--mobile-header-height);
    padding-bottom: calc(var(--mobile-nav-height) + var(--mobile-safe-area-bottom) + 16px);
    min-height: 100vh;
    background: #f3f4f6;
}

.dark-mode .mobile-content {
    background: #111827;
}

.mobile-content-inner {
    padding: 1rem;
    max-width: 768px;
    margin: 0 auto;
}

/* ============================================================
   BOTTOM NAVIGATION
   ============================================================ */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(var(--mobile-nav-height) + var(--mobile-safe-area-bottom));
    padding-bottom: var(--mobile-safe-area-bottom);
    background: var(--nav-bg);
    border-top: 1px solid var(--nav-border);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 100;
}

.dark-mode .bottom-nav {
    background: var(--dark-nav-bg);
    border-color: var(--dark-nav-border);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    text-decoration: none;
    color: var(--nav-text);
    font-size: 0.75rem;
    font-weight: 500;
    transition: all 0.2s;
    gap: 0.25rem;
    min-width: 60px;
    position: relative;
}

.nav-item i {
    font-size: 1.25rem;
}

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

.nav-item.active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 3px;
    background: var(--nav-active);
    border-radius: 0 0 3px 3px;
}

.nav-item:hover:not(.active) {
    background: var(--nav-active-bg);
}

.dark-mode .nav-item {
    color: var(--dark-nav-text);
}

.dark-mode .nav-item.active {
    color: var(--nav-active);
}

.nav-item .nav-badge {
    position: absolute;
    top: 2px;
    right: 8px;
    min-width: 16px;
    height: 16px;
    background: #ef4444;
    color: white;
    border-radius: 8px;
    font-size: 0.625rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

/* ============================================================
   SECTION CARDS
   ============================================================ */
.section-card {
    background: white;
    border-radius: 1rem;
    padding: 1.25rem;
    margin-bottom: 1rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.dark-mode .section-card {
    background: #1f2937;
}

.section-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.section-card-title {
    font-size: 1rem;
    font-weight: 600;
    color: #1f2937;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dark-mode .section-card-title {
    color: #f3f4f6;
}

.section-card-title i {
    color: var(--nav-active);
}

.section-card-action {
    font-size: 0.875rem;
    color: var(--nav-active);
    text-decoration: none;
    font-weight: 500;
}

/* ============================================================
   CATEGORY CARDS (for Learn page)
   ============================================================ */
.category-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

@media (min-width: 640px) {
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.category-card {
    background: white;
    border-radius: 1rem;
    padding: 1.25rem;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s, box-shadow 0.2s;
    border: 2px solid transparent;
}

.category-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.dark-mode .category-card {
    background: #1f2937;
}

.category-card.dyslexia {
    border-color: #3b82f6;
}

.category-card.dyscalculia {
    border-color: #10b981;
}

.category-card.dysgraphia {
    border-color: #f59e0b;
}

.category-card.dyspraxia {
    border-color: #ef4444;
}

.category-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.category-card.dyslexia .category-icon {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}

.category-card.dyscalculia .category-icon {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
}

.category-card.dysgraphia .category-icon {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
}

.category-card.dyspraxia .category-icon {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.category-info h3 {
    font-size: 1rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.25rem;
}

.dark-mode .category-info h3 {
    color: #f3f4f6;
}

.category-info p {
    font-size: 0.75rem;
    color: #6b7280;
}

.category-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: #9ca3af;
}

.category-meta .activity-count {
    background: #f3f4f6;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
}

.dark-mode .category-meta .activity-count {
    background: #374151;
}

/* ============================================================
   ACTIVITY LIST
   ============================================================ */
.activity-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: white;
    border-radius: 0.75rem;
    text-decoration: none;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    transition: background 0.2s;
}

.activity-item:hover {
    background: #f9fafb;
}

.dark-mode .activity-item {
    background: #1f2937;
}

.dark-mode .activity-item:hover {
    background: #374151;
}

.activity-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.activity-info {
    flex: 1;
    min-width: 0;
}

.activity-info h4 {
    font-size: 0.9375rem;
    font-weight: 500;
    color: #1f2937;
    margin-bottom: 0.125rem;
}

.dark-mode .activity-info h4 {
    color: #f3f4f6;
}

.activity-info p {
    font-size: 0.8125rem;
    color: #6b7280;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.activity-arrow {
    color: #9ca3af;
    font-size: 0.875rem;
}

/* ============================================================
   MENU LIST (for profile, doctors hub)
   ============================================================ */
.menu-list {
    display: flex;
    flex-direction: column;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    text-decoration: none;
    color: #1f2937;
    border-bottom: 1px solid #f3f4f6;
    transition: background 0.2s;
}

.menu-item:last-child {
    border-bottom: none;
}

.menu-item:hover {
    background: #f9fafb;
}

.dark-mode .menu-item {
    color: #f3f4f6;
    border-color: #374151;
}

.dark-mode .menu-item:hover {
    background: #374151;
}

.menu-item .menu-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    background: #f3f4f6;
    color: #6b7280;
}

.dark-mode .menu-item .menu-icon {
    background: #374151;
    color: #9ca3af;
}

.menu-item .menu-icon.primary {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}

.menu-item .menu-icon.success {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
}

.menu-item .menu-icon.warning {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
}

.menu-item .menu-icon.danger {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.menu-item .menu-text {
    flex: 1;
}

.menu-item .menu-text h4 {
    font-size: 0.9375rem;
    font-weight: 500;
    margin-bottom: 0.125rem;
}

.menu-item .menu-text p {
    font-size: 0.8125rem;
    color: #6b7280;
}

.menu-item .menu-badge {
    background: #ef4444;
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
}

.menu-item .menu-arrow {
    color: #9ca3af;
}

/* ============================================================
   STATS CARDS (for dashboard/progress)
   ============================================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.stat-card {
    background: white;
    border-radius: 1rem;
    padding: 1rem;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.dark-mode .stat-card {
    background: #1f2937;
}

.stat-card .stat-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    margin: 0 auto 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.stat-card .stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1f2937;
}

.dark-mode .stat-card .stat-value {
    color: #f3f4f6;
}

.stat-card .stat-label {
    font-size: 0.75rem;
    color: #6b7280;
}

/* ============================================================
   LOADING STATE
   ============================================================ */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    color: #6b7280;
}

.loading-state i {
    font-size: 2rem;
    margin-bottom: 1rem;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ============================================================
   EMPTY STATE
   ============================================================ */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    text-align: center;
}

.empty-state i {
    font-size: 3rem;
    color: #d1d5db;
    margin-bottom: 1rem;
}

.empty-state h3 {
    font-size: 1.125rem;
    color: #6b7280;
    margin-bottom: 0.5rem;
}

.empty-state p {
    font-size: 0.875rem;
    color: #9ca3af;
}

/* ============================================================
   RESPONSIVE ADJUSTMENTS
   ============================================================ */
@media (min-width: 768px) {
    .mobile-content-inner {
        padding: 1.5rem;
    }

    .category-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1024px) {

    /* Bottom nav is now VISIBLE on desktop — enhanced styling */
    .bottom-nav {
        display: flex;
        height: 64px;
        max-width: 100%;
        justify-content: center;
        gap: 0.5rem;
        padding: 0 2rem;
    }

    .bottom-nav .nav-item {
        flex-direction: row;
        gap: 0.5rem;
        padding: 0.5rem 1.25rem;
        border-radius: 0.75rem;
        font-size: 0.8125rem;
        min-width: auto;
    }

    .bottom-nav .nav-item i {
        font-size: 1.125rem;
    }

    .bottom-nav .nav-item.active::before {
        width: 40px;
    }

    /* Mobile header can still be hidden on desktop if not needed */
    /* .mobile-header { display: none; } */

    .mobile-content {
        padding-top: 0;
        padding-bottom: calc(64px + 16px);
    }
}