/* Text Diff Tool Specific Styles */

.diff-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.diff-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.input-column {
    display: flex;
    flex-direction: column;
}

.input-column .input-group {
    height: 100%;
}

.input-column textarea {
    height: 100%;
    min-height: 300px;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.5;
    resize: vertical;
}

/* Diff Options */
.diff-options {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.diff-options h3 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

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

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.checkbox-label:hover {
    background-color: var(--border-color);
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary-color);
}

/* Diff Legend */
.diff-legend {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.legend-color.added {
    background-color: var(--diff-added-bg);
}

.legend-color.removed {
    background-color: var(--diff-removed-bg);
}

.legend-color.modified {
    background-color: var(--diff-modified-bg);
}

/* Diff Result Styles */
:root {
    --diff-added-bg: #dcfce7;
    --diff-added-text: #166534;
    --diff-removed-bg: #fef2f2;
    --diff-removed-text: #991b1b;
    --diff-modified-bg: #fef3c7;
    --diff-modified-text: #92400e;
    --diff-line-number: #64748b;
}

[data-theme="dark"] {
    --diff-added-bg: #064e3b;
    --diff-added-text: #6ee7b7;
    --diff-removed-bg: #7f1d1d;
    --diff-removed-text: #fca5a5;
    --diff-modified-bg: #78350f;
    --diff-modified-text: #fcd34d;
    --diff-line-number: #94a3b8;
}

.diff-result-box {
    font-family: var(--font-mono);
    line-height: 1.6;
    white-space: pre-wrap;
    overflow-x: auto;
    max-height: 600px;
    overflow-y: auto;
}

.diff-line {
    display: flex;
    align-items: flex-start;
    padding: 2px 0;
    border-radius: 2px;
    margin: 1px 0;
}

.diff-line-number {
    color: var(--diff-line-number);
    font-size: 0.75rem;
    min-width: 60px;
    text-align: right;
    padding-right: var(--spacing-sm);
    user-select: none;
    flex-shrink: 0;
}

.diff-line-content {
    flex: 1;
    padding-left: var(--spacing-sm);
    white-space: pre-wrap;
    word-break: break-word;
}

.diff-line.added {
    background-color: var(--diff-added-bg);
    color: var(--diff-added-text);
}

.diff-line.removed {
    background-color: var(--diff-removed-bg);
    color: var(--diff-removed-text);
}

.diff-line.modified {
    background-color: var(--diff-modified-bg);
    color: var(--diff-modified-text);
}

.diff-line.context {
    color: var(--text-primary);
}

.diff-line.added::before {
    content: "+";
    color: var(--diff-added-text);
    font-weight: bold;
    margin-right: var(--spacing-sm);
}

.diff-line.removed::before {
    content: "-";
    color: var(--diff-removed-text);
    font-weight: bold;
    margin-right: var(--spacing-sm);
}

.diff-line.modified::before {
    content: "~";
    color: var(--diff-modified-text);
    font-weight: bold;
    margin-right: var(--spacing-sm);
}

.diff-line.context::before {
    content: " ";
    margin-right: var(--spacing-sm);
}

/* Diff Statistics */
.diff-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.stat-label {
    font-weight: 500;
    color: var(--text-secondary);
}

.stat-value {
    font-weight: 700;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.stat-value.added {
    background-color: var(--diff-added-bg);
    color: var(--diff-added-text);
}

.stat-value.removed {
    background-color: var(--diff-removed-bg);
    color: var(--diff-removed-text);
}

.stat-value.modified {
    background-color: var(--diff-modified-bg);
    color: var(--diff-modified-text);
}

/* Placeholder text */
.placeholder-text {
    color: var(--text-secondary);
    font-style: italic;
    text-align: center;
    padding: var(--spacing-xl);
}

/* Guide Section */
.guide-section {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--border-color);
}

.guide-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--primary-color);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.guide-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.guide-card h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.guide-card ol,
.guide-card ul {
    padding-left: var(--spacing-lg);
}

.guide-card li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
    color: var(--text-secondary);
}

.guide-card strong {
    color: var(--text-primary);
}

/* Related Tools */
.related-tools {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--border-color);
}

.related-tools h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--primary-color);
}

.related-tools .tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.related-tools .tool-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.related-tools .tool-card a {
    text-decoration: none;
    color: var(--primary-color);
}

.related-tools .tool-card a:hover {
    text-decoration: underline;
}

.related-tools .tool-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

/* Responsive Design */
@media (max-width: 768px) {
    .diff-inputs {
        grid-template-columns: 1fr;
    }
    
    .input-column textarea {
        min-height: 200px;
    }
    
    .options-grid {
        grid-template-columns: 1fr;
    }
    
    .diff-legend {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .diff-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .diff-line-number {
        min-width: 40px;
        font-size: 0.7rem;
    }
    
    .guide-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .diff-container {
        gap: var(--spacing-md);
    }
    
    .diff-options {
        padding: var(--spacing-md);
    }
    
    .guide-card {
        padding: var(--spacing-md);
    }
}

/* Print Styles */
@media print {
    .global-nav,
    .footer,
    .button-group,
    .diff-options {
        display: none;
    }
    
    .diff-result-box {
        max-height: none;
        overflow: visible;
    }
    
    .diff-line {
        break-inside: avoid;
    }
}