/* Import shared base styles */
@import url('styles.css');

/* ========================================
   DIFF CHECKER SPECIFIC STYLES
   ======================================== */

/* Color Palette for Diff */
:root {
    --color-added: #28a745;
    --color-deleted: #dc3545;
    --color-changed: #ffc107;
    --color-unchanged: #6c757d;
    
    --color-added-bg: rgba(40, 167, 69, 0.15);
    --color-deleted-bg: rgba(220, 53, 69, 0.15);
    --color-changed-bg: rgba(255, 193, 7, 0.15);
    
    --color-added-char: rgba(40, 167, 69, 0.4);
    --color-deleted-char: rgba(220, 53, 69, 0.4);
}

/* Input Panels */
.input-panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.input-panel {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

/* Textarea Wrapper for Line Numbers */
.textarea-wrapper {
    position: relative;
    display: flex;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.line-numbers-column {
    min-width: 50px;
    padding: var(--spacing-md) var(--spacing-sm);
    background: rgba(0, 0, 0, 0.2);
    border-right: 1px solid var(--color-border);
    text-align: right;
    color: var(--color-text-dim);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    white-space: pre;
    -webkit-user-select: none;
    user-select: none;
    overflow: hidden;
}

.line-numbers-column.hidden {
    display: none;
}

.text-input.with-line-numbers {
    border: none;
    border-radius: 0;
    flex: 1;
    padding-left: var(--spacing-sm);
}

/* Tips Panel */
.tips-panel {
    background: linear-gradient(135deg, rgba(0, 255, 159, 0.05) 0%, rgba(0, 212, 255, 0.05) 100%);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.tip-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text);
    font-size: 0.9rem;
}

.tip-icon {
    font-size: 1.2rem;
}

kbd {
    display: inline-block;
    padding: 2px 6px;
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 3px;
    box-shadow: 0 1px 0 var(--color-border);
    margin: 0 2px;
}

.panel-title {
    color: var(--color-text);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.panel-icon {
    color: var(--color-primary);
    font-size: 1.2rem;
}

.text-input {
    width: 100%;
    min-height: 300px;
    padding: var(--spacing-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    resize: vertical;
    transition: border-color 0.3s ease;
}

.text-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.text-input::placeholder {
    color: var(--color-text-dim);
}

.panel-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.btn-link {
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    padding: 6px 12px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.btn-link:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(0, 255, 159, 0.05);
}

.btn-link .icon {
    font-size: 1rem;
}

/* Settings Panel */
.settings-panel {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    align-items: end;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.setting-label {
    font-weight: 600;
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.checkbox-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-muted);
    font-size: 0.85rem;
    cursor: pointer;
}

.checkbox-option input[type="checkbox"] {
    cursor: pointer;
    accent-color: var(--color-primary);
}

.view-mode-selector {
    display: flex;
    gap: var(--spacing-sm);
}

.view-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

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

.view-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-bg);
}

.view-icon {
    font-size: 1rem;
}

/* Results Section */
.results-section {
    margin-top: var(--spacing-xl);
    scroll-margin-top: 100px;
}

/* Statistics Panel */
.stats-panel {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.stats-title {
    color: var(--color-text);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.stats-icon {
    font-size: 1.2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border: 2px solid var(--color-border);
}

.stat-item.stat-added {
    border-color: var(--color-added);
}

.stat-item.stat-deleted {
    border-color: var(--color-deleted);
}

.stat-item.stat-unchanged {
    border-color: var(--color-unchanged);
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-primary);
    font-variant-numeric: tabular-nums;
}

.stat-item.stat-added .stat-value {
    color: var(--color-added);
}

.stat-item.stat-deleted .stat-value {
    color: var(--color-deleted);
}

.stat-item.stat-unchanged .stat-value {
    color: var(--color-unchanged);
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.stats-summary {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

/* Diff Output */
.diff-output {
    margin-bottom: var(--spacing-xxl);
}

.diff-view {
    display: none;
}

.diff-view.active {
    display: block;
}

.diff-container {
    display: flex;
    gap: var(--spacing-md);
}

.diff-panel {
    flex: 1;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.diff-panel.inline-panel {
    flex: none;
    width: 100%;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--color-bg);
    border-bottom: 2px solid var(--color-border);
}

.header-title {
    font-weight: 700;
    color: var(--color-text);
    font-family: var(--font-display);
    font-size: 0.9rem;
}

.copy-panel-btn {
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    padding: 4px 10px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.copy-panel-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.diff-content {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    overflow-x: auto;
    max-height: 600px;
    overflow-y: auto;
}

/* Diff Lines */
.diff-line {
    display: flex;
    min-height: 1.6em;
}

.line-number {
    min-width: 50px;
    padding: 0 var(--spacing-sm);
    text-align: right;
    color: var(--color-text-dim);
    background: var(--color-bg);
    border-right: 1px solid var(--color-border);
    -webkit-user-select: none;
    user-select: none;
    font-variant-numeric: tabular-nums;
}

.line-content {
    flex: 1;
    padding: 0 var(--spacing-sm);
    white-space: pre-wrap;
    word-break: break-all;
}

/* Diff Line Types */
.diff-line.line-added {
    background: var(--color-added-bg);
}

.diff-line.line-added .line-number {
    background: var(--color-added-bg);
    color: var(--color-added);
    font-weight: 700;
}

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

.diff-line.line-deleted .line-number {
    background: var(--color-deleted-bg);
    color: var(--color-deleted);
    font-weight: 700;
}

.diff-line.line-empty .line-content {
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(255, 255, 255, 0.02) 10px,
        rgba(255, 255, 255, 0.02) 20px
    );
}

/* Character-level highlights */
.char-added {
    background: var(--color-added-char);
    font-weight: 700;
}

.char-deleted {
    background: var(--color-deleted-char);
    text-decoration: line-through;
    font-weight: 700;
}

/* Inline Diff Prefix */
.inline-prefix {
    display: inline-block;
    width: 2ch;
    font-weight: 700;
    margin-right: var(--spacing-xs);
}

.inline-prefix.prefix-added {
    color: var(--color-added);
}

.inline-prefix.prefix-deleted {
    color: var(--color-deleted);
}

/* Navigation Panel */
.navigation-panel {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: center;
}

/* Export Panel */
.export-panel {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    display: flex;
    justify-content: center;
}

/* Diff Actions (legacy - kept for backward compatibility) */
.diff-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
}

.navigation-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-btn:hover:not(:disabled) {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.change-counter {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-family: var(--font-mono);
}

.export-controls {
    display: flex;
    gap: var(--spacing-md);
}

/* Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.info-card {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.info-card h4 {
    color: var(--color-primary);
    font-family: var(--font-display);
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
}

.info-card p,
.info-card ul {
    color: var(--color-text-muted);
    line-height: 1.6;
    font-size: 0.9rem;
}

.info-card ul {
    list-style: none;
    padding: 0;
}

.info-card li {
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
    position: relative;
}

.info-card li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

/* Color Legend Styles */
.color-added {
    color: var(--color-added);
}

.color-deleted {
    color: var(--color-deleted);
}

.color-changed {
    color: var(--color-changed);
}

.color-unchanged {
    color: var(--color-unchanged);
}

/* Hidden State */
.hidden {
    display: none !important;
}

/* Mobile Responsive */
@media (max-width: 968px) {
    .input-panels {
        grid-template-columns: 1fr;
    }
    
    .settings-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .diff-container {
        flex-direction: column;
    }
    
    .diff-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .navigation-controls,
    .export-controls {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .settings-grid {
        grid-template-columns: 1fr;
    }
    
    .view-mode-selector {
        flex-direction: column;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .panel-actions {
        flex-direction: column;
    }
    
    .btn-link {
        width: 100%;
        justify-content: center;
    }
}