/* Text Diff Checker - Light Theme */

/* Options Panel */

/* Dark mode overrides */
[data-theme="dark"] {
    --tool-bg: #0f172a;
    --tool-border: #334155;
    --tool-border-hover: #475569;
    --tool-text: #f8fafc;
    --tool-text-secondary: #94a3b8;
    --tool-input-bg: #1e293b;
    --tool-input-border: #334155;
    --tool-button-bg: #1e293b;
    --tool-button-hover: #334155;
    --tool-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
    --tool-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --surface-color: #1e293b;
    --surface-hover: #334155;
    --background-color: #0f172a;
    --text-color: #f8fafc;
    --status-info: rgba(96, 165, 250, 0.2);
    --status-success: rgba(34, 197, 94, 0.2);
    --status-error: rgba(248, 113, 113, 0.2);
    --bg-color: #0f172a;
}

/* Dark mode element overrides */
[data-theme="dark"] .tool-card {
    background: var(--bg-card, #1e293b);
    border-color: var(--border-color, #334155);
}

[data-theme="dark"] .tool-hero {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

[data-theme="dark"] input,
[data-theme="dark"] select,
[data-theme="dark"] textarea {
    background: var(--input-bg, #1e293b);
    color: var(--text-primary, #f8fafc);
    border-color: var(--border-color, #334155);
}

[data-theme="dark"] input::placeholder,
[data-theme="dark"] textarea::placeholder {
    color: var(--text-muted, #64748b);
}

[data-theme="dark"] .tab-btn.active {
    color: white;
}

[data-theme="dark"] label {
    color: var(--text-primary, #f8fafc);
}

[data-theme="dark"] h1, [data-theme="dark"] h2, [data-theme="dark"] h3,
[data-theme="dark"] h4, [data-theme="dark"] h5, [data-theme="dark"] h6 {
    color: var(--text-primary, #f8fafc);
}

[data-theme="dark"] p {
    color: var(--text-secondary, #cbd5e1);
}
.options-panel {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.options-group {
    flex: 1;
    min-width: 200px;
}

.options-group h4 {
    margin: 0 0 1rem 0;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
}

.option-label,
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0.75rem 0;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.option-label input,
.checkbox-label input {
    margin: 0;
}

/* Input Container */
.input-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.input-panel {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.input-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.input-header h3 {
    margin: 0;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
}

.input-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.char-count {
    font-size: 0.8rem;
    color: var(--text-muted);
    var(--bg-primary)-space: nowrap;
}

.input-panel textarea {
    width: 100%;
    border: none;
    outline: none;
    padding: 1.5rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: vertical;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 400px;
}

/* Hidden Elements */
.hidden-file-input {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    var(--bg-primary)-space: nowrap;
    border: 0;
}

/* Results Container */
.results-container {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
    display: none;
}

.results-container.visible {
    display: block;
}

.results-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.results-header h3 {
    margin: 0;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
}

.results-stats {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.stat-icon {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

.stat-icon.added {
    background: #10b981;
}

.stat-icon.deleted {
    background: #ef4444;
}

.stat-icon.modified {
    background: #f59e0b;
}

/* Diff Display */
.diff-display {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-bottom: 1px solid var(--border-color);
}

.diff-panel {
    border-right: 1px solid var(--border-color);
}

.diff-panel:last-child {
    border-right: none;
}

.diff-panel-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.diff-panel-header h4 {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
}

.diff-legend {
    display: flex;
    gap: 0.75rem;
}

.legend-item {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    color: var(--bg-primary);
    font-weight: 500;
}

.legend-item.added {
    background: #10b981;
}

.legend-item.deleted {
    background: #ef4444;
}

.legend-item.unchanged {
    background: var(--text-muted);
}

.diff-content {
    padding: 1rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 13px;
    line-height: 1.5;
    max-height: 500px;
    overflow-y: auto;
    background: var(--bg-primary);
}

/* Diff Line Styles */
.diff-line {
    display: flex;
    margin: 0;
    padding: 0.25rem 0.5rem;
    border-radius: 3px;
    var(--bg-primary)-space: pre-wrap;
    word-break: break-all;
}

.diff-line.added {
    background: var(--color-green-soft);
    border-left: 3px solid #10b981;
}

.diff-line.deleted {
    background: var(--color-red-soft);
    border-left: 3px solid #ef4444;
}

.diff-line.modified {
    background: var(--color-yellow-soft);
    border-left: 3px solid #f59e0b;
}

.diff-line.unchanged {
    background: transparent;
    color: var(--text-muted);
}

.line-number {
    display: inline-block;
    width: 40px;
    text-align: right;
    color: var(--text-muted);
    font-size: 11px;
    margin-right: 1rem;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.line-content {
    flex: 1;
}

/* Highlighted Changes */
.diff-change {
    padding: 0.125rem 0.25rem;
    border-radius: 2px;
    font-weight: 600;
}

.diff-change.added {
    background: #10b981;
    color: var(--bg-primary);
}

.diff-change.deleted {
    background: #ef4444;
    color: var(--bg-primary);
}

/* Unified Diff */
.unified-diff {
    border-top: 1px solid var(--border-color);
}

.unified-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.unified-header h4 {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
}

.unified-content {
    margin: 0;
    padding: 1rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 13px;
    line-height: 1.5;
    max-height: 400px;
    overflow-y: auto;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    var(--bg-primary)-space: pre-wrap;
    word-break: break-all;
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    border: none;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: #3b82f6;
    color: var(--bg-primary);
}

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

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background: var(--bg-secondary);
    border-color: var(--text-muted);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
}

/* Info Section */
.info-section {
    margin-top: 2rem;
}

.info-panel {
    background: var(--bg-primary);
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 2rem;
}

.info-panel h3 {
    color: var(--text-primary);
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.usage-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.step-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.step-number {
    background: #3b82f6;
    color: var(--bg-primary);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.step-content h4 {
    color: var(--text-secondary);
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
}

.step-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0;
    line-height: 1.5;
}

.info-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.feature-item {
    text-align: center;
    padding: 1rem;
}

.feature-item h4 {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.feature-item p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .options-panel {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .options-group {
        min-width: auto;
    }
    
    .input-container {
        grid-template-columns: 1fr;
    }
    
    .diff-display {
        grid-template-columns: 1fr;
    }
    
    .diff-panel {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .diff-panel:last-child {
        border-bottom: none;
    }
}

@media (max-width: 768px) {
    .input-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .input-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .results-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .results-stats {
        gap: 0.75rem;
    }
    
    .diff-panel-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .usage-steps {
        grid-template-columns: 1fr;
    }
    
    .info-features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .options-panel {
        padding: 1rem;
    }
    
    .input-panel textarea {
        padding: 1rem;
        font-size: 12px;
    }
    
    .diff-content {
        padding: 0.75rem;
        font-size: 12px;
    }
    
    .unified-content {
        padding: 0.75rem;
        font-size: 12px;
    }
    
    .step-item {
        flex-direction: column;
        text-align: center;
    }
}