/* Clean & Accessible Navigation & Layout */

/* Simple Navigation Tabs */
.nav-tabs {
    display: flex;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-light);
    overflow-x: auto;
    scrollbar-width: thin;
    padding: 0 var(--spacing-xs);
    width: 100%;
    box-sizing: border-box;
    flex-wrap: nowrap;
    min-height: 50px;
    align-items: center;
    transition: background-color var(--transition), border-color var(--transition);
}

.nav-tabs::-webkit-scrollbar {
    height: 4px;
}

.nav-tabs::-webkit-scrollbar-track {
    background-color: var(--bg-accent);
}

.nav-tabs::-webkit-scrollbar-thumb {
    background-color: var(--border-medium);
    border-radius: 2px;
}

.nav-tab {
    flex: 0 0 auto;
    padding: var(--spacing-sm) var(--spacing-xs);
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: var(--text-xs);
    color: var(--text-secondary);
    transition: color var(--transition), background-color var(--transition);
    border-bottom: 3px solid transparent;
    white-space: nowrap;
    font-family: inherit;
    text-align: center;
    box-sizing: border-box;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    position: relative;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 90px;
    min-width: 70px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-tab:hover:not(.active) {
    color: var(--text-primary);
    background-color: var(--bg-hover);
    border-bottom-color: var(--border-medium);
}

.nav-tab.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
    background-color: var(--bg-accent);
    font-weight: 700;
}

/* Tab Content */
.tab-content {
    display: none;
    padding: var(--spacing-lg);
    min-height: calc(100vh - 200px);
    max-width: 100%;
    margin: 0 auto;
    overflow-x: hidden;
    box-sizing: border-box;
}

.tab-content.active {
    display: block;
}

/* Clean Home Page */
.intro-card {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    text-align: center;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    transition: background-color var(--transition), border-color var(--transition);
}

.intro-card h2 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-lg);
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.intro-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
    font-size: var(--text-base);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* FIXED: Intro card text visibility in dark mode */
[data-theme="dark"] .intro-card p {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .intro-card ul {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .intro-card ul li {
    color: var(--text-secondary) !important;
}

.quick-start {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.quick-start-item {
    background-color: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    min-height: 100px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.quick-start-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.quick-start-item h4 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
    font-size: var(--text-lg);
    font-weight: 700;
}

.quick-start-item p {
    color: var(--text-secondary);
    font-size: var(--text-sm);
    line-height: 1.5;
    margin: 0;
}

/* FIXED: Quick start text visibility in dark mode */
[data-theme="dark"] .quick-start-item p {
    color: var(--text-secondary) !important;
}

/* Content Builders */
.word-builder-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Options */
.detailed-options {
    display: none;
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background-color: var(--bg-accent);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    transition: background-color var(--transition), border-color var(--transition);
}

.detailed-options.show {
    display: block;
}

.detailed-options label {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: block;
    font-size: var(--text-lg);
}

/* Grammar Rules */
.grammar-rule {
    background-color: var(--bg-secondary);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--accent-primary);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    transition: background-color var(--transition), border-color var(--transition);
}

.grammar-rule-title {
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
    font-size: var(--text-lg);
}

.grammar-rule-example {
    background-color: var(--bg-accent);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
    font-family: 'Courier New', monospace;
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.5;
    border: 1px solid var(--border-light);
    transition: background-color var(--transition), border-color var(--transition), color var(--transition);
}

/* Export Buttons - FIXED */
.export-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    width: 100%;
}

.export-buttons .btn {
    width: 100%;
    white-space: normal;
    word-wrap: break-word;
    hyphens: auto;
    text-align: center;
    padding: var(--spacing-md) var(--spacing-sm);
    line-height: 1.4;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* FIXED: Comprehensive dark mode text visibility fixes */
[data-theme="dark"] div[style*="color: #666"],
[data-theme="dark"] p[style*="color: #666"],
[data-theme="dark"] span[style*="color: #666"],
[data-theme="dark"] small[style*="color: #666"] {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] div[style*="color: #999"],
[data-theme="dark"] p[style*="color: #999"],
[data-theme="dark"] span[style*="color: #999"] {
    color: var(--text-muted) !important;
}

[data-theme="dark"] div[style*="color: #888"],
[data-theme="dark"] p[style*="color: #888"],
[data-theme="dark"] span[style*="color: #888"] {
    color: var(--text-muted) !important;
}

[data-theme="dark"] div[style*="color: #555"],
[data-theme="dark"] p[style*="color: #555"],
[data-theme="dark"] span[style*="color: #555"] {
    color: var(--text-secondary) !important;
}

/* FIXED: Ensure all text in sections is visible */
[data-theme="dark"] .section-card p,
[data-theme="dark"] .section-card ul,
[data-theme="dark"] .section-card li,
[data-theme="dark"] .section-card span:not(.phoneme):not(.morpheme-tag):not(.confidence-high):not(.confidence-medium):not(.confidence-low),
[data-theme="dark"] .section-card div:not(.btn):not(.form-control):not(.phoneme):not(.morpheme-tag) {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .section-card h1,
[data-theme="dark"] .section-card h2, 
[data-theme="dark"] .section-card h3,
[data-theme="dark"] .section-card h4,
[data-theme="dark"] .section-card h5,
[data-theme="dark"] .section-card h6 {
    color: var(--text-primary) !important;
}

/* FIXED: Sample details text */
[data-theme="dark"] .sample-details {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .sample-details strong {
    color: var(--text-primary) !important;
}

/* FIXED: Activity text visibility */
[data-theme="dark"] #recent-activity,
[data-theme="dark"] #recent-activity p,
[data-theme="dark"] #recent-activity div,
[data-theme="dark"] #recent-activity span {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] #recent-activity strong {
    color: var(--text-primary) !important;
}

/* FIXED: Generated names visibility */
[data-theme="dark"] .name-meaning,
[data-theme="dark"] .name-pattern {
    color: var(--text-secondary) !important;
}

/* FIXED: Word builder descriptions */
[data-theme="dark"] .word-builder p,
[data-theme="dark"] .word-builder span,
[data-theme="dark"] .word-builder div:not(.btn) {
    color: var(--text-secondary) !important;
}

/* FIXED: Feature highlight overrides */
[data-theme="dark"] .feature-highlight,
[data-theme="dark"] .feature-highlight * {
    background-color: #451a03 !important;
    border-color: #92400e !important;
    color: #fed7aa !important;
}

[data-theme="dark"] .feature-highlight strong {
    color: #fdba74 !important;
}

/* FIXED: Form descriptions and labels */
[data-theme="dark"] .form-group label {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .form-group small,
[data-theme="dark"] small {
    color: var(--text-muted) !important;
}

/* FIXED: Morphological system overview text */
[data-theme="dark"] .morphology-overview,
[data-theme="dark"] .morphology-overview * {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .morphology-overview strong {
    color: var(--text-primary) !important;
}

/* Responsive Design */
@media (max-width: 639px) {
    .nav-tabs {
        padding: 0 var(--spacing-xs);
        justify-content: flex-start;
    }
    
    .nav-tab {
        padding: var(--spacing-xs);
        font-size: 0.65rem;
        min-width: 65px;
        max-width: 85px;
        text-align: center;
        height: 36px;
    }
    
    .tab-content {
        padding: var(--spacing-md);
    }
    
    .intro-card {
        padding: var(--spacing-lg);
    }
    
    .intro-card h2 {
        font-size: 1.5rem;
    }
    
    .quick-start {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .quick-start-item {
        padding: var(--spacing-md);
        min-height: 80px;
    }
    
    .word-builder-form {
        flex-direction: column;
    }
    
    .export-buttons {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .export-buttons .btn {
        min-height: 60px;
        font-size: var(--text-sm);
        padding: var(--spacing-md);
    }
}

@media (min-width: 640px) {
    .nav-tab {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--text-sm);
        min-width: 90px;
        max-width: 120px;
        height: 42px;
    }
    
    .quick-start {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-lg);
    }
    
    .word-builder-form {
        flex-direction: row;
        align-items: end;
    }
    
    .export-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .nav-tabs {
        padding: 0 var(--spacing-md);
    }
    
    .nav-tab {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--text-base);
        min-width: 100px;
        max-width: 140px;
        height: 44px;
    }
    
    .tab-content {
        padding: var(--spacing-xl);
    }
    
    .intro-card h2 {
        font-size: 2rem;
    }
    
    .intro-card p {
        font-size: var(--text-lg);
    }
    
    .export-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .nav-tabs {
        justify-content: center;
        overflow-x: visible;
        flex-wrap: wrap;
        min-height: 60px;
        align-items: center;
        padding: 0 var(--spacing-lg);
    }
    
    .nav-tab {
        flex: 0 1 auto;
        max-width: 150px;
        min-width: 110px;
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--text-base);
        height: 46px;
    }
    
    .intro-card h2 {
        font-size: 2.25rem;
    }
    
    .quick-start {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .export-buttons {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1200px) {
    .nav-tabs {
        flex-wrap: nowrap;
        overflow-x: visible;
        justify-content: center;
    }
    
    .nav-tab {
        flex: 1;
        max-width: 160px;
        min-width: 120px;
        height: 48px;
    }
    
    .tab-content {
        padding: var(--spacing-2xl);
    }
}

/* Ensure content doesn't overflow horizontally */
* {
    max-width: 100%;
    box-sizing: border-box;
}

/* Fix container overflow */
.container {
    overflow-x: hidden;
}

/* Ensure buttons don't break layout */
.btn {
    word-wrap: break-word;
    hyphens: auto;
}

/* Additional navigation fixes for very small screens */
@media (max-width: 480px) {
    .nav-tabs {
        padding: 0 var(--spacing-xs);
    }
    
    .nav-tab {
        padding: var(--spacing-xs);
        font-size: 0.6rem;
        min-width: 60px;
        max-width: 75px;
        height: 34px;
    }
    
    .export-buttons {
        grid-template-columns: 1fr;
    }
    
    .export-buttons .btn {
        font-size: var(--text-sm);
        padding: var(--spacing-md);
        min-height: 70px;
    }
}