/* ========================================
   PHARM DRUG LIST PAGE v2 - Enterprise Design
   ========================================
   
   This file uses CSS variables from:
   - theme-base.css (spacing, typography, borders, transitions)
   - theme-dark.css (colors, shadows)
   
   Architecture: Component-based, modular structure
   Version: 2.0
   Date: January 2025
   
   SOP Compliance:
   - DRY: Uses project CSS variables, no hardcoded values
   - SRP: Each section handles one responsibility
   - KISS: Simple, straightforward styling
*/

/* ========================================
   BASE STYLES
   ======================================== */

.pharm-page {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-4);
}

/* ========================================
   PAGE HEADER
   ======================================== */

.page-header {
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--border-primary);
}

.page-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--brand-primary);
    margin-bottom: var(--space-2);
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
}

/* ========================================
   FILTERS & SEARCH CONTAINER
   ======================================== */

.filters-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    margin-bottom: var(--space-6);
}

.search-bar {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.search-input {
    flex: 1;
    padding: var(--space-3);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
}

.search-input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: var(--shadow-focus);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.filters-row {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
    align-items: flex-end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    flex: 1;
    min-width: 200px;
}

.filter-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
}

.filter-select {
    padding: var(--space-3);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-base);
}

.filter-select:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: var(--shadow-focus);
}

.clear-filters-btn {
    padding: var(--space-3) var(--space-6);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.clear-filters-btn:hover {
    background: var(--bg-accent);
    border-color: var(--border-secondary);
}

/* ========================================
   RESULTS METADATA (Enterprise Pattern)
   ======================================== */

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
    gap: var(--space-3);
}

.results-count {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.header-controls {
    display: flex;
    gap: var(--space-3);
    align-items: center;
    flex-wrap: wrap;
}

.view-toggle {
    display: flex;
    gap: var(--space-2);
}

.summary-toggle,
.trade-name-toggle {
    padding: var(--space-2) var(--space-3);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.summary-toggle:hover,
.trade-name-toggle:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-secondary);
}

.summary-toggle.active,
.trade-name-toggle.active {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: white;
}

.view-btn {
    padding: var(--space-2) var(--space-3);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
}

.view-btn.active {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: white;
}

.view-btn:hover:not(.active) {
    background: var(--bg-tertiary);
    border-color: var(--border-secondary);
}

/* ========================================
   DRUG CARDS (Enterprise Grid Pattern)
   ======================================== */

.drugs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.drug-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    transition: all var(--transition-base);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.drug-card:hover {
    border-color: var(--brand-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    background: var(--bg-tertiary);
}

.drug-name {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--brand-primary);
    margin-bottom: var(--space-2);
}

.drug-name a {
    color: inherit;
    text-decoration: none;
}

.drug-name a:hover {
    text-decoration: underline;
}

.trade-name {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-3);
    font-style: italic;
}

.drug-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.meta-badge {
    padding: var(--space-1) var(--space-2);
    background: var(--bg-accent);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    color: var(--text-primary);
}

.drug-summary {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-base);
    margin-top: auto;
}

.drug-summary.truncated {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.drug-summary.expanded {
    display: block;
}

/* ========================================
   LIST VIEW STYLES (Enterprise Pattern)
   ======================================== */

.drugs-list {
    display: none;
    flex-direction: column;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.drugs-list.active {
    display: flex;
}

.drugs-grid.active {
    display: grid;
}

.drugs-grid:not(.active) {
    display: none;
}

.drug-item {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4);
    transition: all var(--transition-base);
    cursor: pointer;
}

.drug-item:hover {
    border-color: var(--brand-primary);
    background: var(--bg-tertiary);
}

.drug-item-left {
    flex: 1;
}

.drug-item-name {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--brand-primary);
    margin-bottom: var(--space-2);
}

.drug-item-name a {
    color: inherit;
    text-decoration: none;
}

.drug-item-name a:hover {
    text-decoration: underline;
}

.drug-item-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.drug-item-summary {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.drug-item-summary.truncated {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.drug-item-summary.expanded {
    display: block;
}

/* ========================================
   PAGINATION (Enterprise Pattern)
   ======================================== */

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-2);
    margin: var(--space-6) 0;
    flex-wrap: wrap;
}

.pagination-btn {
    padding: var(--space-2) var(--space-3);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    min-width: 40px;
    text-align: center;
}

.pagination-btn:hover:not(:disabled) {
    background: var(--bg-tertiary);
    border-color: var(--border-secondary);
}

.pagination-btn.active {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: white;
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* SOP-errors-to-avoid.md: CSP compliant - no inline styles */
.pagination-ellipsis {
    border: none !important;
    background: transparent !important;
    cursor: default !important;
    pointer-events: none !important;
}

/* ========================================
   LOADING & EMPTY STATES
   ======================================== */

.loading-state,
.empty-state {
    text-align: center;
    padding: var(--space-12);
    color: var(--text-secondary);
}

.loading-text {
    margin-top: var(--space-4);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--space-4);
    opacity: 0.5;
}

.empty-state-title {
    margin-bottom: var(--space-2);
}

.trade-name-hidden {
    display: none;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 768px) {
    .pharm-page {
        padding: var(--space-3);
    }
    
    .filters-row {
        flex-direction: column;
    }
    
    .filter-group {
        min-width: 100%;
    }
    
    .results-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .drugs-grid {
        grid-template-columns: 1fr;
    }
    
    .drug-item {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .pharm-page {
        padding: var(--space-2);
    }
    
    .page-title {
        font-size: var(--font-size-xl);
    }
    
    .filters-container {
        padding: var(--space-3);
    }
}