/* ===============================================
   HERO SECTION BACKGROUND
   =============================================== */

.tool-hero {
    background: linear-gradient(135deg, var(--bg-primary) 0%, rgba(59, 130, 246, 0.1) 30%, rgba(16, 185, 129, 0.1) 70%, var(--bg-primary) 100%);
    overflow: hidden;
}

.tool-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(16, 185, 129, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.tool-hero .container {
    position: relative;
    z-index: 3;
}

/* ===============================================
   TEXT DIFF & MERGE TOOL STYLES
   =============================================== */

/* Main Tool Section */
.tool-section {
    padding: var(--space-16) 0;
    background: var(--bg-primary);
}

.calculator-card {
    background: var(--bg-primary);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-lg);
    max-width: 1400px;
    margin: 0 auto;
}

[data-theme="dark"] .calculator-card {
    background: var(--bg-secondary);
    border-color: var(--gray-700);
}

.card-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.card-header h2 {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.card-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* Mode Selector */
.mode-selector {
    margin-bottom: var(--space-6);
}

.mode-buttons {
    display: flex;
    gap: var(--space-2);
    justify-content: center;
    flex-wrap: wrap;
}

.mode-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border: 2px solid var(--gray-300);
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
}

.mode-btn:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
    transform: translateY(-1px);
}

.mode-btn.active {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: var(--text-inverse);
}

[data-theme="dark"] .mode-btn {
    border-color: var(--gray-600);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

[data-theme="dark"] .mode-btn.active {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: var(--text-inverse);
}

/* Tool Options */
.tool-options {
    margin-bottom: var(--space-6);
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

[data-theme="dark"] .tool-options {
    background: var(--bg-tertiary);
    border-color: var(--gray-600);
}

.options-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-6);
    align-items: center;
    justify-content: space-between;
}

.diff-options {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    align-items: center;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.option-group label {
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    font-size: 0.875rem;
}

.diff-mode-buttons {
    display: flex;
    gap: var(--space-2);
}

.diff-type-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--gray-300);
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: var(--radius-base);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-base);
}

.diff-type-btn:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

.diff-type-btn.active {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: var(--text-inverse);
}

[data-theme="dark"] .diff-type-btn {
    border-color: var(--gray-600);
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.checkbox-option {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

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

.checkbox-option label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.language-selector {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.language-selector label {
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    font-size: 0.875rem;
}

.language-selector select {
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-base);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
}

[data-theme="dark"] .language-selector select {
    border-color: var(--gray-600);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Diff Container */
.diff-container, .merge-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.diff-panes, .merge-panes {
    display: grid;
    gap: var(--space-4);
    grid-template-columns: 1fr 1fr;
}

.merge-panes {
    grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 1024px) {
    .merge-panes {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .diff-panes {
        grid-template-columns: 1fr;
    }
}

.diff-pane, .merge-pane {
    background: var(--bg-primary);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

[data-theme="dark"] .diff-pane,
[data-theme="dark"] .merge-pane {
    background: var(--bg-tertiary);
    border-color: var(--gray-600);
}

.pane-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-3) var(--space-4);
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

[data-theme="dark"] .pane-header {
    background: var(--bg-secondary);
    border-bottom-color: var(--gray-600);
}

.pane-header h3 {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.pane-actions {
    display: flex;
    gap: var(--space-2);
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-base);
    cursor: pointer;
    transition: all var(--transition-base);
}

.action-btn:hover {
    background: var(--gray-100);
    color: var(--text-primary);
}

[data-theme="dark"] .action-btn:hover {
    background: var(--gray-700);
    color: var(--text-primary);
}

.pane-content {
    position: relative;
    height: 300px;
}

.pane-content textarea {
    width: 100%;
    height: 100%;
    border: none;
    padding: var(--space-4);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    background: var(--bg-primary);
    color: var(--text-primary);
    resize: none;
    outline: none;
}

[data-theme="dark"] .pane-content textarea {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.syntax-preview {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    padding: var(--space-4);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: auto;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.syntax-preview.active {
    opacity: 1;
    pointer-events: auto;
}

/* Results Section */
.diff-results, .merge-results {
    background: var(--bg-primary);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

[data-theme="dark"] .diff-results,
[data-theme="dark"] .merge-results {
    background: var(--bg-tertiary);
    border-color: var(--gray-600);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-3) var(--space-4);
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

[data-theme="dark"] .results-header {
    background: var(--bg-secondary);
    border-bottom-color: var(--gray-600);
}

.results-header h3 {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.diff-stats {
    display: flex;
    gap: var(--space-4);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.merge-actions {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.merge-action-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border: 2px solid var(--gray-300);
    background: var(--bg-primary);
    color: var(--text-primary);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    min-width: 140px;
    justify-content: center;
}

.merge-action-btn:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.merge-action-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.merge-action-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: var(--shadow-sm);
}

.merge-action-btn:disabled:hover {
    border-color: var(--gray-300);
    color: var(--text-primary);
    transform: none;
}

/* Special styling for specific merge actions */
.merge-action-btn#autoMerge {
    border-color: #10b981;
    color: #10b981;
}

.merge-action-btn#autoMerge:hover {
    background: #10b981;
    color: white;
    border-color: #10b981;
}

.merge-action-btn#copyMerged {
    border-color: #3b82f6;
    color: #3b82f6;
}

.merge-action-btn#copyMerged:hover {
    background: #3b82f6;
    color: white;
    border-color: #3b82f6;
}

[data-theme="dark"] .merge-action-btn {
    border-color: var(--gray-600);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

[data-theme="dark"] .merge-action-btn#autoMerge {
    border-color: #34d399;
    color: #34d399;
}

[data-theme="dark"] .merge-action-btn#autoMerge:hover {
    background: #34d399;
    color: #064e3b;
}

[data-theme="dark"] .merge-action-btn#copyMerged {
    border-color: #60a5fa;
    color: #60a5fa;
}

[data-theme="dark"] .merge-action-btn#copyMerged:hover {
    background: #60a5fa;
    color: #1e3a8a;
}

.results-content {
    padding: var(--space-4);
    min-height: 200px;
    max-height: 400px;
    overflow: auto;
}

.diff-placeholder, .merge-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 150px;
    color: var(--text-tertiary);
    text-align: center;
}

.diff-placeholder i, .merge-placeholder i {
    font-size: 2rem;
    margin-bottom: var(--space-2);
    opacity: 0.5;
}

/* Diff Output Styles */
.diff-output {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    white-space: pre-wrap;
}

.diff-line {
    display: block;
    padding: 2px 4px;
    margin: 1px 0;
    border-radius: 2px;
}

.diff-line.added {
    background: #d4edda;
    color: #155724;
    border-left: 3px solid #28a745;
}

.diff-line.removed {
    background: #f8d7da;
    color: #721c24;
    border-left: 3px solid #dc3545;
}

.diff-line.modified {
    background: #fff3cd;
    color: #856404;
    border-left: 3px solid #ffc107;
}

[data-theme="dark"] .diff-line.added {
    background: #1a4a2a;
    color: #4ade80;
    border-left-color: #22c55e;
}

[data-theme="dark"] .diff-line.removed {
    background: #4a1a1a;
    color: #f87171;
    border-left-color: #ef4444;
}

[data-theme="dark"] .diff-line.modified {
    background: #4a3a1a;
    color: #fbbf24;
    border-left-color: #f59e0b;
}

.diff-inline {
    padding: 1px 2px;
    border-radius: 2px;
}

.diff-inline.added {
    background: #28a745;
    color: white;
}

.diff-inline.removed {
    background: #dc3545;
    color: white;
    text-decoration: line-through;
}

[data-theme="dark"] .diff-inline.added {
    background: #22c55e;
    color: #000;
}

[data-theme="dark"] .diff-inline.removed {
    background: #ef4444;
    color: #000;
}

/* Merge Output Styles */
.merge-output {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    white-space: pre-wrap;
}

.conflict-block {
    margin: var(--space-2) 0;
    border: 2px solid var(--error);
    border-radius: var(--radius-base);
    overflow: hidden;
}

.conflict-header {
    background: var(--error);
    color: var(--text-inverse);
    padding: var(--space-2) var(--space-3);
    font-weight: var(--font-weight-semibold);
    font-size: 0.875rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Conflict Resolution Buttons */
.conflict-options {
    display: flex;
    gap: var(--space-2);
}

.conflict-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-4);
    border: 2px solid var(--gray-300);
    background: var(--bg-primary);
    color: var(--text-primary);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.conflict-btn:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.conflict-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.conflict-btn[data-action="mine"] {
    border-color: #3b82f6;
    color: #3b82f6;
}

.conflict-btn[data-action="mine"]:hover {
    background: #3b82f6;
    color: white;
}

.conflict-btn[data-action="theirs"] {
    border-color: #f59e0b;
    color: #f59e0b;
}

.conflict-btn[data-action="theirs"]:hover {
    background: #f59e0b;
    color: white;
}

.conflict-btn[data-action="both"] {
    border-color: #10b981;
    color: #10b981;
}

.conflict-btn[data-action="both"]:hover {
    background: #10b981;
    color: white;
}

.conflict-btn[data-action="edit"] {
    border-color: #8b5cf6;
    color: #8b5cf6;
}

.conflict-btn[data-action="edit"]:hover {
    background: #8b5cf6;
    color: white;
}

[data-theme="dark"] .conflict-btn {
    border-color: var(--gray-600);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

[data-theme="dark"] .conflict-btn[data-action="mine"] {
    border-color: #60a5fa;
    color: #60a5fa;
}

[data-theme="dark"] .conflict-btn[data-action="theirs"] {
    border-color: #fbbf24;
    color: #fbbf24;
}

[data-theme="dark"] .conflict-btn[data-action="both"] {
    border-color: #34d399;
    color: #34d399;
}

[data-theme="dark"] .conflict-btn[data-action="edit"] {
    border-color: #a78bfa;
    color: #a78bfa;
}

/* Conflict Block Styling */
.conflict-block {
    margin: var(--space-4) 0;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    background: var(--bg-primary);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

[data-theme="dark"] .conflict-block {
    border-color: var(--gray-700);
    background: var(--bg-secondary);
}

.conflict-header {
    background: linear-gradient(135deg, #fee2e2 0%, #fef3c7 100%);
    padding: var(--space-4);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-3);
}

[data-theme="dark"] .conflict-header {
    background: linear-gradient(135deg, #431d23 0%, #452a1a 100%);
    border-bottom-color: var(--gray-700);
}

.conflict-header span {
    font-weight: var(--font-weight-semibold);
    color: #dc2626;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.conflict-header span::before {
    content: "⚠️";
    font-size: 1.125rem;
}

[data-theme="dark"] .conflict-header span {
    color: #fca5a5;
}

.conflict-content {
    background: var(--bg-primary);
    padding: 0;
}

[data-theme="dark"] .conflict-content {
    background: var(--bg-secondary);
}

.conflict-section {
    margin: 0;
    padding: var(--space-4);
    border-bottom: 1px solid var(--gray-100);
    position: relative;
}

.conflict-section:last-child {
    border-bottom: none;
}

[data-theme="dark"] .conflict-section {
    border-bottom-color: var(--gray-700);
}

.conflict-section.base {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-left: 4px solid var(--gray-400);
}

.conflict-section.mine {
    background: linear-gradient(135deg, #dbeafe 0%, #e0f2fe 100%);
    border-left: 4px solid #3b82f6;
}

.conflict-section.theirs {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-left: 4px solid #f59e0b;
}

[data-theme="dark"] .conflict-section.base {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    border-left-color: var(--gray-500);
}

[data-theme="dark"] .conflict-section.mine {
    background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 100%);
    border-left-color: #60a5fa;
}

[data-theme="dark"] .conflict-section.theirs {
    background: linear-gradient(135deg, #92400e 0%, #b45309 100%);
    border-left-color: #fbbf24;
}

.conflict-label {
    font-weight: var(--font-weight-bold);
    font-size: 0.875rem;
    margin-bottom: var(--space-3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.conflict-label::before {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    content: "";
}

.conflict-section.base .conflict-label::before {
    background: var(--gray-400);
}

.conflict-section.mine .conflict-label::before {
    background: #3b82f6;
}

.conflict-section.theirs .conflict-label::before {
    background: #f59e0b;
}

.conflict-section pre {
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-3);
    margin: 0;
    font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
}

[data-theme="dark"] .conflict-section pre {
    background: rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* Resolved conflict styling */
.conflict-block.resolved {
    opacity: 0.7;
    border-color: #10b981;
}

.conflict-block.resolved .conflict-header {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
}

[data-theme="dark"] .conflict-block.resolved .conflict-header {
    background: linear-gradient(135deg, #064e3b 0%, #065f46 100%);
}

.conflict-block.resolved .conflict-header span {
    color: #059669;
}

.conflict-block.resolved .conflict-header span::before {
    content: "✅";
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    margin-top: var(--space-8);
    flex-wrap: wrap;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border: 2px solid var(--gray-300);
    background: transparent;
    color: var(--text-primary);
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-secondary:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
    transform: translateY(-1px);
}

[data-theme="dark"] .btn-secondary {
    border-color: var(--gray-600);
    color: var(--text-primary);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    background: var(--brand-primary);
    color: var(--text-inverse);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: #2563EB;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Diff Controls */
.diff-controls {
    display: flex;
    gap: var(--space-4);
    align-items: center;
    flex-wrap: wrap;
}

.diff-controls .btn-primary {
    padding: var(--space-2) var(--space-4);
    font-size: 0.875rem;
    min-width: auto;
}

@media (max-width: 768px) {
    .diff-controls {
        flex-direction: column;
        gap: var(--space-2);
        align-items: stretch;
    }
    
    .diff-controls .btn-primary {
        width: 100%;
        justify-content: center;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .calculator-card {
        padding: var(--space-4);
        margin: 0 var(--space-2);
    }
    
    .options-row {
        flex-direction: column;
        align-items: stretch;
    }
    
    .diff-options {
        flex-direction: column;
        align-items: stretch;
    }
    
    .diff-mode-buttons {
        justify-content: center;
    }
    
    .language-selector {
        justify-content: center;
    }
    
    .pane-content {
        height: 250px;
    }
    
    .results-header {
        flex-direction: column;
        gap: var(--space-2);
        align-items: stretch;
    }
    
    .diff-stats, .merge-actions {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .mode-buttons {
        flex-direction: column;
    }
    
    .mode-btn {
        width: 100%;
        justify-content: center;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        justify-content: center;
    }
}

/* Scrollbar Styling */
.results-content::-webkit-scrollbar,
.pane-content textarea::-webkit-scrollbar,
.syntax-preview::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.results-content::-webkit-scrollbar-track,
.pane-content textarea::-webkit-scrollbar-track,
.syntax-preview::-webkit-scrollbar-track {
    background: var(--gray-100);
}

.results-content::-webkit-scrollbar-thumb,
.pane-content textarea::-webkit-scrollbar-thumb,
.syntax-preview::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 4px;
}

[data-theme="dark"] .results-content::-webkit-scrollbar-track,
[data-theme="dark"] .pane-content textarea::-webkit-scrollbar-track,
[data-theme="dark"] .syntax-preview::-webkit-scrollbar-track {
    background: var(--gray-700);
}

[data-theme="dark"] .results-content::-webkit-scrollbar-thumb,
[data-theme="dark"] .pane-content textarea::-webkit-scrollbar-thumb,
[data-theme="dark"] .syntax-preview::-webkit-scrollbar-thumb {
    background: var(--gray-500);
}

/* Animation for mode switching */
.diff-container, .merge-container {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Prism.js theme overrides for dark mode */
[data-theme="dark"] pre[class*="language-"] {
    background: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] code[class*="language-"] {
    color: var(--text-primary) !important;
}

/* Custom conflict resolution section */
.conflict-section.custom {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-left: 4px solid #0ea5e9;
}

[data-theme="dark"] .conflict-section.custom {
    background: linear-gradient(135deg, #0c4a6e 0%, #075985 100%);
    border-left-color: #38bdf8;
}

/* Conflict Edit Modal */
.conflict-edit-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease-out;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

[data-theme="dark"] .modal-content {
    background: var(--bg-secondary);
    border-color: var(--gray-700);
}

.modal-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--gray-50) 100%);
}

[data-theme="dark"] .modal-header {
    border-bottom-color: var(--gray-700);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--gray-800) 100%);
}

.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-base);
    transition: all var(--transition-base);
}

.modal-close:hover {
    background: var(--gray-100);
    color: var(--text-primary);
}

[data-theme="dark"] .modal-close:hover {
    background: var(--gray-700);
}

.modal-body {
    padding: var(--space-6);
}

.modal-body label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
}

.conflict-editor {
    width: 100%;
    min-height: 120px;
    padding: var(--space-3);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    background: var(--bg-primary);
    color: var(--text-primary);
    resize: vertical;
    transition: border-color var(--transition-base);
}

.conflict-editor:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

[data-theme="dark"] .conflict-editor {
    background: var(--bg-tertiary);
    border-color: var(--gray-600);
}

.modal-footer {
    padding: var(--space-6);
    border-top: 1px solid var(--gray-200);
    display: flex;
    gap: var(--space-3);
    justify-content: flex-end;
    background: var(--gray-50);
}

[data-theme="dark"] .modal-footer {
    border-top-color: var(--gray-700);
    background: var(--gray-800);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    background: var(--brand-primary);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--brand-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Utility classes */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}