/* ====
   Global Styles
   ==== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Primary Colors - Blue Theme */
    --primary-color: #2196F3;
    --primary-dark: #1976D2;
    --primary-light: #BBDEFB;
    --primary-lighter: #E3F2FD;
    
    /* Secondary Colors */
    --secondary-color: #757575;
    --secondary-light: #BDBDBD;
    
    /* Accent Colors */
    --accent-color: #FF9800;
    --success-color: #4CAF50;
    --warning-color: #FFC107;
    --error-color: #F44336;
    
    /* Background Colors */
    --bg-primary: #FFFF;
    --bg-secondary: #F5F5F5;
    --bg-tertiary: #FAFAFA;
    --bg-hover: #E8F4FD;
    
    /* Text Colors */
    --text-primary: #212121;
    --text-secondary: #757575;
    --text-light: #FFFF;
    
    /* Border Colors */
    --border-color: #E0E0E0;
    --border-light: #F0F0F0;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    
    /* Sizes */
    --header-height: 64px;
    --sidebar-width: 280px;
    --filters-height: auto;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ====
   Header
   ==== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--primary-color);
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    box-shadow: var(--shadow-md);
    z-index: 1000;
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 20px;
    font-weight: 600;
}

.logo i {
    font-size: 24px;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: var(--spacing-md);
    color: var(--text-secondary);
}

.search-box input {
    width: 300px;
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 40px;
    border: none;
    border-radius: var(--radius-md);
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--text-light);
    transition: var(--transition);
}

.search-box input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.search-box input:focus {
    outline: none;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

.user-menu {
    position: relative;
}

#userMenuBtn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: transparent;
    color: var(--text-light);
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

#userMenuBtn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + var(--spacing-sm));
    right: 0;
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    display: none;
    overflow: hidden;
}

.dropdown-menu.active {
    display: block;
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.dropdown-menu a:hover {
    background-color: var(--bg-hover);
}

.dropdown-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: var(--spacing-xs) 0;
}

/* ====
   Main Content Layout
   ==== */

.main-content {
    display: flex;
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
    gap: 0;
}

/* ====
   3-Column Layout Container
   ==== */

.three-column-container {
    display: flex;
    width: 50%;
    max-width: 50%;
    background-color: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    overflow: hidden;
}

.filter-column {
    flex: 1;
    min-width: 0; /* Allows flex items to shrink below content size */
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
}

.filter-column:last-child {
    border-right: none;
}

.column-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    min-height: 52px;
}

.column-header h3 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    margin: 0;
}

.btn-icon-small {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    border: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    color: var(--primary-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.btn-icon-small:hover {
    background-color: var(--primary-color);
    color: var(--text-light);
    border-color: var(--primary-color);
}

.column-list {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--spacing-sm);
}

/* Category/Area items in columns */
.category-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-primary);
    position: relative;
    margin-bottom: var(--spacing-xs);
    word-wrap: break-word;
}

.category-item:hover {
    background-color: var(--bg-hover);
}

.category-item.active {
    background-color: var(--primary-lighter);
    color: var(--primary-color);
    font-weight: 500;
}

.category-item i {
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.category-item span:first-of-type {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.badge {
    background-color: var(--secondary-light);
    color: var(--text-light);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 500;
    flex-shrink: 0;
}

.category-item.active .badge {
    background-color: var(--primary-color);
}

/* Hide columns initially */
#categoryColumn, #subCategoryColumn {
    display: none;
}

#categoryColumn.visible, #subCategoryColumn.visible {
    display: flex;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag-item {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
}

.tag-item:hover {
    opacity: 0.8;
    transform: translateY(-1px);
}

/* ====
   Content Area
   ==== */

.content-tiles {
    flex: 1;
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

/* ====
   Filters Bar - HIDDEN (Using 3-Column Layout Instead)
   ==== */

.filters-bar {
    display: none;
}

.filter-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-height: 36px;
}

.filter-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    min-width: 80px;
    flex-shrink: 0;
}

.filter-items {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    flex: 1;
    align-items: center;
}

.filter-add-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    border: 1px dashed var(--border-color);
    background-color: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.filter-add-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background-color: var(--primary-lighter);
}

/* Category Navigation - Horizontal Compact */
#categoryNav {
    display: none;
}

#categoryNav.active {
    display: block;
}

.category-list-horizontal {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    flex: 1;
}

.category-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-tertiary);
    border-radius: 18px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
}

.category-chip:hover {
    border-color: var(--primary-color);
    background-color: var(--primary-lighter);
    color: var(--primary-color);
    transform: translateY(-1px);
}

.category-chip.active {
    background-color: var(--primary-color);
    color: var(--text-light);
    border-color: var(--primary-color);
}

/* Sub-category Navigation - Horizontal Compact */
#subCategoryNav {
    display: none;
}

#subCategoryNav.active {
    display: block;
}

.subcategory-list {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    flex: 1;
}

.subcategory-item {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-tertiary);
    border-radius: 18px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
}

.subcategory-item:hover {
    border-color: var(--primary-color);
    background-color: var(--primary-lighter);
    color: var(--primary-color);
    transform: translateY(-1px);
}

.subcategory-item.active {
    background-color: var(--primary-color);
    color: var(--text-light);
    border-color: var(--primary-color);
}

/* ====
   Content Header
   ==== */

.content-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

.content-header h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
}

.content-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--text-secondary);
    min-height: 400px;
}

.empty-state i {
    font-size: 64px;
    margin-bottom: var(--spacing-lg);
    opacity: 0.3;
}

.empty-state h3 {
    font-size: 24px;
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    font-size: 16px;
}

/* ====
   Buttons
   ==== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-light);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--secondary-light);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--secondary-color);
    color: var(--text-light);
}

.btn-danger {
    background-color: var(--error-color);
    color: var(--text-light);
}

.btn-danger:hover {
    background-color: #D32F2F;
}

.btn-warning {
    background-color: #FF9800;
    color: var(--text-light);
}

.btn-warning:hover {
    background-color: #F57C00;
    box-shadow: var(--shadow-md);
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border: none;
    background-color: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon:hover {
    background-color: var(--bg-hover);
    color: var(--primary-color);
}

/* ====
   Forms
   ==== */

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="url"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-lighter);
}

.form-group input[type="color"] {
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
}

.form-group small {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 12px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.form-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    margin-top: var(--spacing-lg);
}

/* ====
   Tables
   ==== */

.data-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.data-table thead {
    background-color: var(--bg-secondary);
}

.data-table th,
.data-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    font-weight: 600;
    color: var(--text-primary);
}

.data-table tbody tr:hover {
    background-color: var(--bg-hover);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* ====
   Toast Notifications
   ==== */

.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--text-primary);
    color: var(--text-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    transform: translateY(200%);
    transition: transform 0.3s ease;
    z-index: 10000;
    max-width: 400px;
}

.toast.show {
    transform: translateY(0);
}

.toast.success {
    background-color: var(--success-color);
}

.toast.error {
    background-color: var(--error-color);
}

.toast.warning {
    background-color: var(--warning-color);
}

/* ====
   Loading Spinner
   ==== */

.loading-spinner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--text-light);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ====
   Responsive Design
   ==== */

@media (max-width: 1024px) {
    .three-column-container {
        width: 60%;
        max-width: 60%;
    }
}

@media (max-width: 768px) {
    .search-box input {
        width: 200px;
    }
    
    .main-content {
        flex-direction: column;
    }
    
    .three-column-container {
        width: 100%;
        max-width: 100%;
        height: 300px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .content-tiles {
        padding: var(--spacing-md);
    }
    
    .content-header h2 {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .header-left,
    .header-right {
    gap: var(--spacing-sm);
    }
    
    .logo span {
    display: none;
    }
    
    .search-box {
    display: none;
    }
    
    .filters-bar {
    padding: var(--spacing-sm);
    }
    
    .category-chip,
    .subcategory-item {
    font-size: 12px;
    padding: 4px 10px;
    }
}