/* Mobile-First Responsive Design */

/* Base styles for mobile (320px+) */
* {
    box-sizing: border-box;
}

body {
    font-size: 14px;
    line-height: 1.4;
    margin: 0;
    padding: 0;
}

.header-content {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
    padding: 0.75rem;
}

.nav-list {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.25rem;
}

.nav-link {
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    min-height: 44px;
    display: flex;
    align-items: center;
}

.app-section {
    padding: 0.75rem;
    margin: 0.25rem;
    border-radius: 8px;
}

.stats-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.dashboard-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.about-content {
    grid-template-columns: 1fr;
    gap: 1rem;
}

.library-controls {
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.form-row {
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.settings-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.table-controls {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
}

/* Mobile table - card layout */
.records-table {
    display: none;
}

.records-mobile {
    display: block;
}

.record-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 8px;
    padding: 0.75rem;
    margin-bottom: 0.75rem;
    box-shadow: var(--shadow-light);
    min-height: 44px;
}

.record-card h4 {
    margin: 0 0 0.5rem 0;
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.3;
}

.record-card .meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.record-card .actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.record-card .actions button {
    min-height: 44px;
    flex: 1;
    min-width: 120px;
}

/* Touch-friendly buttons */
button, .btn {
    min-height: 44px;
    min-width: 44px;
    padding: 0.75rem 1rem;
    touch-action: manipulation;
}

/* Form inputs */
input, select, textarea {
    min-height: 44px;
    font-size: 16px;
    padding: 0.75rem;
}

/* Quick actions mobile */
.quick-actions {
    flex-direction: column;
    gap: 0.5rem;
}

.action-btn {
    width: 100%;
    justify-content: center;
    min-height: 48px;
}

/* Small Mobile Landscape (360px+) */
@media (min-width: 360px) {
    body {
        font-size: 15px;
    }
    
    .nav-link {
        font-size: 0.85rem;
        padding: 0.6rem 0.8rem;
    }
    
    .app-section {
        padding: 0.875rem;
        margin: 0.375rem;
    }
}

/* Large Mobile (414px+) */
@media (min-width: 414px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .record-card .actions {
        flex-wrap: nowrap;
    }
    
    .record-card .actions button {
        min-width: 100px;
    }
}

/* Small Mobile Landscape/Large Mobile (480px+) */
@media (min-width: 480px) {
    body {
        font-size: 16px;
    }
    
    .app-section {
        padding: 1rem;
        margin: 0.5rem;
    }
    
    .nav-link {
        font-size: 0.9rem;
        padding: 0.75rem 1rem;
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .quick-actions {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .action-btn {
        flex: 1;
        min-width: 150px;
    }
}

/* Tablet Portrait (600px+) */
@media (min-width: 600px) {
    .header-content {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
        padding: 1rem;
    }
    
    .nav-list {
        flex-wrap: nowrap;
        gap: 0.5rem;
    }
    
    .library-controls {
        grid-template-columns: 2fr 1fr;
        gap: 1rem;
    }
    
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
    
    .settings-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Tablet Portrait (768px+) */
@media (min-width: 768px) {
    .app-section {
        padding: 1.5rem;
        margin: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .about-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .table-controls {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    /* Show table on tablet+ */
    .records-table {
        display: table;
        width: 100%;
        overflow-x: auto;
    }
    
    .records-mobile {
        display: none;
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Tablet Landscape (1024px+) */
@media (min-width: 1024px) {
    .app-section {
        padding: 2rem;
        margin: 1.5rem;
    }
    
    .settings-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

/* Desktop (1200px+) */
@media (min-width: 1200px) {
    .app-section {
        padding: 2.5rem;
    }
    
    main {
        max-width: 1200px;
        margin: 0 auto;
    }
}

/* Large Desktop (1440px+) */
@media (min-width: 1440px) {
    body {
        font-size: 18px;
    }
    
    main {
        max-width: 1400px;
    }
    
    .app-section {
        padding: 3rem;
    }
}

/* Ultra-wide (1920px+) */
@media (min-width: 1920px) {
    main {
        max-width: 1600px;
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Tablet Landscape (1024px+) */
@media (min-width: 1024px) {
    .app-section {
        padding: 2.5rem;
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .settings-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Desktop (1200px+) */
@media (min-width: 1200px) {
    .app-section {
        padding: 3rem;
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

/* Large Desktop (1440px+) */
@media (min-width: 1440px) {
    body {
        font-size: 18px;
    }
    
    main {
        max-width: 1400px;
    }
}

/* Print Styles */
@media print {
    .nav-list,
    .quick-actions,
    .actions,
    .setting-actions {
        display: none;
    }
    
    .app-section {
        box-shadow: none;
        border: 1px solid #000;
        page-break-inside: avoid;
    }
    
    .records-table {
        font-size: 12px;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --border-primary: #000;
        --border-secondary: #333;
    }
    
    .nav-link {
        border: 2px solid transparent;
    }
    
    .nav-link:focus,
    .nav-link.active {
        border-color: #fff;
    }
}

/* Mobile-specific optimizations */
@media (max-width: 767px) {
    /* Prevent horizontal scroll */
    body {
        overflow-x: hidden;
    }
    
    /* Optimize touch targets */
    .nav-link,
    button,
    .btn,
    input,
    select {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* Improve readability */
    .about-card,
    .dashboard-card,
    .setting-card {
        padding: 1rem;
    }
    
    /* Stack form elements */
    .form-actions {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .form-actions .btn {
        width: 100%;
    }
    
    /* Mobile-friendly tables */
    .table-controls {
        position: sticky;
        top: 0;
        background: var(--bg-primary);
        z-index: 10;
        padding: 0.75rem;
        margin: -0.75rem -0.75rem 0.75rem -0.75rem;
    }
}

/* Landscape mobile optimizations */
@media (max-height: 500px) and (orientation: landscape) {
    .header-content {
        padding: 0.5rem;
    }
    
    .nav-link {
        padding: 0.4rem 0.6rem;
        font-size: 0.75rem;
    }
    
    .app-section {
        padding: 0.5rem;
        margin: 0.25rem;
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .search-highlight {
        box-shadow: 0 0.5px 1.5px rgba(0, 0, 0, 0.2);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}