/**
 * Document Difference Visualizer - Complete Styles
 * Supports Light/Dark Theme & Responsive Design
 */

/* =====================================================
   BASE STYLES & CONTAINER
===================================================== */
.doc-diff-tool {
    max-width: 100%;
    margin: 0 auto;
    font-family: var(--font-family, 'Inter', sans-serif);
}

.doc-diff-tool * {
    box-sizing: border-box;
}

/* =====================================================
   HEADER SECTION
===================================================== */
.ddt-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 2rem;
    background: linear-gradient(135deg,
            rgba(var(--primary-rgb), 0.08) 0%,
            rgba(var(--secondary-rgb), 0.05) 100%);
    border-radius: 20px;
    margin-bottom: 2rem;
    border: 1px solid rgba(var(--primary-rgb), 0.1);
    flex-wrap: wrap;
    gap: 1.5rem;
}

.doc-diff-tool .header-content {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.doc-diff-tool .header-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #fff;
    box-shadow: 0 8px 20px rgba(var(--primary-rgb), 0.25);
    flex-shrink: 0;
}

.doc-diff-tool .header-text h2 {
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0 0 0.35rem 0;
    color: var(--text-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.doc-diff-tool .header-text p {
    font-size: 0.95rem;
    color: var(--text-color);
    opacity: 0.7;
    margin: 0;
}

.doc-diff-tool .header-badges {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.doc-diff-tool .badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.doc-diff-tool .badge-secure {
    background: rgba(46, 204, 113, 0.1);
    color: #27ae60;
    border: 1px solid rgba(46, 204, 113, 0.2);
}

.doc-diff-tool .badge-info {
    background: rgba(52, 152, 219, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(52, 152, 219, 0.2);
}

.doc-diff-tool .badge-warning {
    background: rgba(241, 196, 15, 0.1);
    color: #f39c12;
    border: 1px solid rgba(241, 196, 15, 0.2);
}

/* =====================================================
   MODE TABS
===================================================== */
.ddt-mode-tabs {
    display: flex;
    gap: 0.75rem;
    padding: 0.5rem;
    background: var(--card-background);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.mode-tab {
    flex: 1;
    min-width: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 1rem 1.5rem;
    background: transparent;
    border: 2px solid transparent;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-color);
    opacity: 0.6;
    transition: all 0.3s ease;
}

.mode-tab:hover {
    opacity: 1;
    background: rgba(var(--primary-rgb), 0.05);
}

.mode-tab.active {
    opacity: 1;
    background: linear-gradient(135deg,
            rgba(var(--primary-rgb), 0.1),
            rgba(var(--secondary-rgb), 0.08));
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.mode-tab i {
    font-size: 1.1rem;
}

/* =====================================================
   MODE CONTENT
===================================================== */
.ddt-mode-content {
    display: none;
    animation: fadeIn 0.4s ease;
}

.ddt-mode-content.active {
    display: block;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =====================================================
   TEXT INPUT CARDS (Compare Grid)
===================================================== */
.compare-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.text-input-card {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.text-input-card:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.1);
}

.doc-diff-tool .card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    background: rgba(var(--primary-rgb), 0.03);
    border-bottom: 1px solid var(--border-color);
}

.doc-diff-tool .card-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.9rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 700;
}

.doc-diff-tool .card-badge.original {
    background: rgba(52, 152, 219, 0.12);
    color: var(--primary-color);
}

.doc-diff-tool .card-badge.modified {
    background: rgba(46, 204, 113, 0.12);
    color: #27ae60;
}

.card-actions {
    display: flex;
    gap: 0.5rem;
}

.doc-diff-tool .btn-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    opacity: 0.6;
    cursor: pointer;
    transition: all 0.2s ease;
}

.doc-diff-tool .btn-icon:hover {
    opacity: 1;
    background: rgba(var(--primary-rgb), 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.text-input-card textarea {
    width: 100%;
    min-height: 280px;
    padding: 1.25rem;
    border: none;
    background: transparent;
    color: var(--text-color);
    font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;
    font-size: 0.95rem;
    line-height: 1.7;
    resize: vertical;
}

.text-input-card textarea:focus {
    outline: none;
}

.text-input-card textarea::placeholder {
    color: var(--text-color);
    opacity: 0.4;
}

.text-stats {
    display: flex;
    gap: 1.25rem;
    padding: 0.85rem 1.25rem;
    background: rgba(var(--primary-rgb), 0.03);
    border-top: 1px solid var(--border-color);
    font-size: 0.82rem;
    color: var(--text-color);
    opacity: 0.7;
}

.text-stats span {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.text-stats i {
    color: var(--primary-color);
    font-size: 0.9rem;
}

/* =====================================================
   FILE UPLOAD CARDS
===================================================== */
.file-upload-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.file-upload-card {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
}

.file-upload-card .card-header {
    padding: 1rem 1.25rem;
    background: rgba(var(--primary-rgb), 0.03);
    border-bottom: 1px solid var(--border-color);
}

.file-dropzone {
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px dashed transparent;
    margin: 1rem;
    border-radius: 12px;
}

.file-dropzone:hover,
.file-dropzone.dragover {
    border-color: var(--primary-color);
    background: rgba(var(--primary-rgb), 0.05);
}

.file-dropzone i {
    font-size: 3rem;
    color: var(--primary-color);
    opacity: 0.6;
    margin-bottom: 1rem;
    display: block;
}

.file-dropzone p {
    font-size: 1rem;
    color: var(--text-color);
    margin: 0 0 0.5rem 0;
}

.file-dropzone p span {
    color: var(--primary-color);
    text-decoration: underline;
    font-weight: 600;
}

.file-types {
    font-size: 0.8rem;
    color: var(--text-color);
    opacity: 0.5;
}

.file-info {
    padding: 1rem;
    margin: 1rem;
    background: rgba(var(--primary-rgb), 0.05);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.file-info.hidden {
    display: none;
}

/* =====================================================
   VERSION TIMELINE
===================================================== */
.version-manager {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
}

.version-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.version-header h3 {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-color);
}

.version-header h3 i {
    color: var(--primary-color);
}

.btn-small {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-small:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(var(--primary-rgb), 0.3);
}

.btn-small.success {
    background: linear-gradient(135deg, #27ae60, #2ecc71);
}

.btn-small.danger {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
}

.version-empty {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-color);
    opacity: 0.6;
}

.version-empty i {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
    color: var(--primary-color);
    opacity: 0.4;
}

.version-empty p {
    margin: 0 0 0.5rem 0;
    font-weight: 600;
}

.version-empty span {
    font-size: 0.9rem;
}

.version-list {
    min-height: 200px;
}

.timeline-viz {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.timeline-viz.hidden {
    display: none;
}

#timelineCanvas {
    width: 100%;
    height: 200px;
    border-radius: 8px;
    background: rgba(var(--primary-rgb), 0.02);
}

/* =====================================================
   SETTINGS PANEL
===================================================== */
.ddt-settings {
    margin-bottom: 1.5rem;
}

.settings-toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-color);
}

.settings-toggle:hover {
    border-color: var(--primary-color);
}

.settings-toggle i:first-child {
    color: var(--primary-color);
}

.settings-toggle span {
    flex: 1;
    font-weight: 600;
}

.settings-toggle i:last-child {
    transition: transform 0.3s ease;
    opacity: 0.5;
}

.settings-toggle.active i:last-child {
    transform: rotate(180deg);
}

.settings-content {
    padding: 1.5rem;
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 12px 12px;
    margin-top: -1px;
}

.settings-content.hidden {
    display: none;
}

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

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.setting-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-color);
    opacity: 0.8;
}

.setting-group select {
    padding: 0.75rem 1rem;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.setting-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.setting-group.checkboxes {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.75rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 1rem;
    background: rgba(var(--primary-rgb), 0.03);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

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

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

/* =====================================================
   ACTION BUTTONS
===================================================== */
.ddt-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.doc-diff-tool .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.25);
}

.doc-diff-tool .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(var(--primary-rgb), 0.35);
}

.doc-diff-tool .btn-primary:active {
    transform: translateY(-1px);
}

.doc-diff-tool .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    background: transparent;
    color: var(--text-color);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.doc-diff-tool .btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(var(--primary-rgb), 0.05);
}

/* =====================================================
   RESULTS SECTION
===================================================== */
.ddt-results {
    animation: slideUp 0.5s ease;
}

.ddt-results.hidden {
    display: none;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Results Dashboard */
.results-dashboard {
    display: grid;
    grid-template-columns: 1.3fr repeat(4, 1fr);
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.doc-diff-tool .result-card {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem;
    text-align: center;
    transition: all 0.3s ease;
}

.doc-diff-tool .result-card:hover {
    border-color: rgba(var(--primary-rgb), 0.3);
    transform: translateY(-3px);
}

.doc-diff-tool .result-card.primary {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    text-align: left;
    background: linear-gradient(135deg,
            rgba(var(--primary-rgb), 0.08),
            rgba(var(--secondary-rgb), 0.05));
}

.result-ring {
    position: relative;
    width: 90px;
    height: 90px;
    flex-shrink: 0;
}

.result-ring svg {
    transform: rotate(-90deg);
    width: 100%;
    height: 100%;
}

.ring-bg {
    fill: none;
    stroke: var(--border-color);
    stroke-width: 8;
}

.ring-fill {
    fill: none;
    stroke: url(#ringGradient);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 283;
    stroke-dashoffset: 283;
    transition: stroke-dashoffset 1s ease;
}

.ring-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.ring-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
}

.ring-label {
    font-size: 0.8rem;
    color: var(--text-color);
    opacity: 0.6;
}

.result-info {
    flex: 1;
}

.doc-diff-tool .result-title {
    display: block;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 0.25rem;
}

.doc-diff-tool .result-subtitle {
    font-size: 0.8rem;
    color: var(--text-color);
    opacity: 0.6;
}

.doc-diff-tool .result-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    font-size: 1.25rem;
    margin: 0 auto 0.75rem;
}

.result-icon.additions {
    background: rgba(46, 204, 113, 0.12);
    color: #27ae60;
}

.result-icon.deletions {
    background: rgba(231, 76, 60, 0.12);
    color: #e74c3c;
}

.result-icon.modifications {
    background: rgba(241, 196, 15, 0.12);
    color: #f39c12;
}

.result-icon.moves {
    background: rgba(155, 89, 182, 0.12);
    color: #9b59b6;
}

.doc-diff-tool .result-number {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-color);
    display: block;
    margin-bottom: 0.25rem;
}

.doc-diff-tool .result-label {
    font-size: 0.8rem;
    color: var(--text-color);
    opacity: 0.6;
}

/* =====================================================
   CHANGE SUMMARY
===================================================== */
.change-summary {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.change-summary h3 {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.1rem;
    margin: 0 0 1.25rem 0;
    color: var(--text-color);
}

.change-summary h3 i {
    color: var(--primary-color);
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.stat-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1rem;
    background: rgba(var(--primary-rgb), 0.03);
    border-radius: 10px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.7;
}

.stat-value {
    font-size: 1rem;
    font-weight: 700;
}

.stat-value.added {
    color: #27ae60;
}

.stat-value.removed {
    color: #e74c3c;
}

.stat-value.modified {
    color: #f39c12;
}

/* =====================================================
   VIEW TABS
===================================================== */
.view-tabs {
    display: flex;
    gap: 0.5rem;
    padding: 0.4rem;
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.view-tab {
    flex: 1;
    min-width: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-color);
    opacity: 0.6;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.view-tab:hover {
    opacity: 1;
    background: rgba(var(--primary-rgb), 0.05);
}

.view-tab.active {
    opacity: 1;
    background: var(--primary-color);
    color: #fff;
}

/* =====================================================
   DIFF FILTERS
===================================================== */
.diff-filters {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1rem;
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    opacity: 0.7;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.filter-btn:hover {
    opacity: 1;
    border-color: var(--primary-color);
}

.filter-btn.active {
    opacity: 1;
    background: rgba(var(--primary-rgb), 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* =====================================================
   DIFF VIEWS
===================================================== */
.diff-view {
    display: none;
}

.diff-view.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

/* Side by Side View */
.diff-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.diff-pane {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.diff-pane.original-pane {
    border-top: 3px solid var(--primary-color);
}

.diff-pane.modified-pane {
    border-top: 3px solid #27ae60;
}

.pane-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1rem;
    background: rgba(var(--primary-rgb), 0.03);
    border-bottom: 1px solid var(--border-color);
}

.pane-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-color);
}

.pane-title i {
    color: var(--primary-color);
}

.line-count {
    font-size: 0.8rem;
    color: var(--text-color);
    opacity: 0.5;
}

.diff-content {
    max-height: 450px;
    overflow-y: auto;
    padding: 1rem;
    font-family: 'Fira Code', 'Monaco', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
}

.diff-line {
    display: flex;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    margin-bottom: 2px;
}

.diff-line-number {
    width: 40px;
    text-align: right;
    padding-right: 12px;
    color: var(--text-color);
    opacity: 0.4;
    font-size: 0.8rem;
    user-select: none;
    flex-shrink: 0;
}

.diff-line-content {
    flex: 1;
    white-space: pre-wrap;
    word-break: break-word;
}

.diff-line.added {
    background: rgba(46, 204, 113, 0.15);
}

.diff-line.added .diff-line-content {
    color: #27ae60;
}

.diff-line.removed {
    background: rgba(231, 76, 60, 0.15);
}

.diff-line.removed .diff-line-content {
    color: #e74c3c;
    text-decoration: line-through;
}

.diff-line.modified {
    background: rgba(241, 196, 15, 0.15);
}

.diff-line.modified .diff-line-content {
    color: #f39c12;
}

.diff-line.moved {
    background: rgba(155, 89, 182, 0.15);
}

.diff-line.moved .diff-line-content {
    color: #9b59b6;
}

/* Inline View */
.inline-diff-container {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 2rem;
}

.diff-legend {
    display: flex;
    gap: 1.5rem;
    padding: 1rem 1.25rem;
    background: rgba(var(--primary-rgb), 0.03);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-color);
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
}

.legend-color.addition {
    background: rgba(46, 204, 113, 0.5);
}

.legend-color.deletion {
    background: rgba(231, 76, 60, 0.5);
}

.legend-color.modification {
    background: rgba(241, 196, 15, 0.5);
}

.legend-color.move {
    background: rgba(155, 89, 182, 0.5);
}

.inline-diff-content {
    padding: 1.5rem;
    font-family: 'Fira Code', 'Monaco', monospace;
    font-size: 0.95rem;
    line-height: 2;
    max-height: 500px;
    overflow-y: auto;
}

/* Word-level highlighting */
.inline-diff-content .word-added {
    background: rgba(46, 204, 113, 0.3);
    color: #27ae60;
    padding: 0.1rem 0.25rem;
    border-radius: 3px;
}

.inline-diff-content .word-removed {
    background: rgba(231, 76, 60, 0.3);
    color: #e74c3c;
    text-decoration: line-through;
    padding: 0.1rem 0.25rem;
    border-radius: 3px;
}

.inline-diff-content .word-modified {
    background: rgba(241, 196, 15, 0.3);
    color: #f39c12;
    padding: 0.1rem 0.25rem;
    border-radius: 3px;
}

/* Unified View */
.unified-diff-container {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 2rem;
}

.unified-header {
    padding: 1rem 1.25rem;
    background: rgba(var(--primary-rgb), 0.03);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    color: var(--text-color);
}

.unified-diff-content {
    padding: 1.5rem;
    font-family: 'Fira Code', 'Monaco', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
    max-height: 500px;
    overflow-y: auto;
    margin: 0;
    background: transparent;
    color: var(--text-color);
    white-space: pre-wrap;
}

/* Heatmap View */
.heatmap-container {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 2rem;
}

.heatmap-legend {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(var(--primary-rgb), 0.03);
    border-bottom: 1px solid var(--border-color);
}

.legend-text {
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.7;
}

.heatmap-gradient {
    width: 200px;
    height: 12px;
    border-radius: 6px;
    background: linear-gradient(90deg,
            #27ae60,
            #f1c40f,
            #e67e22,
            #e74c3c);
}

.heatmap-content {
    padding: 1.5rem;
    max-height: 500px;
    overflow-y: auto;
}

.heatmap-line {
    padding: 0.5rem 1rem;
    margin-bottom: 2px;
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.heatmap-line:hover {
    transform: translateX(5px);
}

/* =====================================================
   CHANGE CLASSIFICATION
===================================================== */
.change-classification {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.change-classification h3 {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.1rem;
    margin: 0 0 1.25rem 0;
    color: var(--text-color);
}

.change-classification h3 i {
    color: var(--primary-color);
}

.classification-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.doc-diff-tool .class-card {
    text-align: center;
    padding: 1.25rem;
    background: rgba(var(--primary-rgb), 0.03);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.doc-diff-tool .class-card:hover {
    transform: translateY(-3px);
    background: rgba(var(--primary-rgb), 0.08);
}

.doc-diff-tool .class-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    font-size: 1.25rem;
    margin: 0 auto 0.75rem;
}

.doc-diff-tool .class-icon.grammar {
    background: rgba(52, 152, 219, 0.12);
    color: var(--primary-color);
}

.doc-diff-tool .class-icon.content {
    background: rgba(46, 204, 113, 0.12);
    color: #27ae60;
}

.doc-diff-tool .class-icon.formatting {
    background: rgba(155, 89, 182, 0.12);
    color: #9b59b6;
}

.doc-diff-tool .class-icon.structural {
    background: rgba(230, 126, 34, 0.12);
    color: #e67e22;
}

.doc-diff-tool .class-count {
    display: block;
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-color);
    margin-bottom: 0.25rem;
}

.doc-diff-tool .class-label {
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.6;
}

/* =====================================================
   ANNOTATIONS PANEL
===================================================== */
.annotations-panel {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.doc-diff-tool .panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.doc-diff-tool .panel-header h3 {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.1rem;
    margin: 0;
    color: var(--text-color);
}

.panel-header h3 i {
    color: var(--primary-color);
}

.annotations-list {
    min-height: 120px;
}

.annotations-empty {
    text-align: center;
    padding: 2rem;
    color: var(--text-color);
    opacity: 0.5;
}

.annotations-empty i {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
    display: block;
    color: var(--primary-color);
    opacity: 0.4;
}

.annotation-item {
    padding: 1rem;
    background: rgba(var(--primary-rgb), 0.03);
    border-radius: 10px;
    margin-bottom: 0.75rem;
    border-left: 3px solid var(--primary-color);
}

/* =====================================================
   REVIEW PANEL
===================================================== */
.review-panel {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.review-actions {
    display: flex;
    gap: 0.5rem;
}

.review-stats {
    display: flex;
    gap: 1.5rem;
    padding: 1rem 0;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.review-stats span {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    color: var(--text-color);
}

.review-stats i {
    font-size: 1rem;
}

.review-stats .fa-check-circle {
    color: #27ae60;
}

.review-stats .fa-times-circle {
    color: #e74c3c;
}

.review-stats .fa-clock {
    color: #f39c12;
}

/* =====================================================
   QUALITY SCORE PANEL
===================================================== */
.quality-score-panel {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.quality-score-panel h3 {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.1rem;
    margin: 0 0 1.5rem 0;
    color: var(--text-color);
}

.quality-score-panel h3 i {
    color: #f1c40f;
}

.quality-metrics {
    display: grid;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.quality-metric {
    display: grid;
    grid-template-columns: 150px 1fr 50px;
    align-items: center;
    gap: 1rem;
}

.metric-name {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.8;
}

.metric-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.metric-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
    transition: width 1s ease;
}

.metric-value {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary-color);
    text-align: right;
}

.overall-quality {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1.25rem;
    background: linear-gradient(135deg,
            rgba(var(--primary-rgb), 0.1),
            rgba(var(--secondary-rgb), 0.08));
    border-radius: 12px;
}

.quality-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
}

.quality-score {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* =====================================================
   EXPORT BUTTONS
===================================================== */
.ddt-export {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.btn-export {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.25rem;
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-color);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-export:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-export i {
    font-size: 1rem;
}

.btn-export.secondary {
    background: rgba(var(--primary-rgb), 0.05);
}

/* =====================================================
   ALGORITHM INFO SECTION
===================================================== */
.ddt-algorithm-info {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
}

.info-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.info-header i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.info-header h3 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--text-color);
}

.algorithm-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.doc-diff-tool .step {
    text-align: center;
    position: relative;
}

.doc-diff-tool .step:not(:last-child)::after {
    content: '→';
    position: absolute;
    right: -1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.25rem;
    color: var(--primary-color);
    opacity: 0.5;
}

.doc-diff-tool .step-number {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border-radius: 50%;
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.doc-diff-tool .step-content h4 {
    font-size: 1rem;
    margin: 0 0 0.35rem 0;
    color: var(--text-color);
}

.doc-diff-tool .step-content p {
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.6;
    margin: 0;
}

/* =====================================================
   RESPONSIVE DESIGN
===================================================== */

/* Tablet */
@media (max-width: 992px) {
    .ddt-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .compare-grid,
    .file-upload-grid,
    .diff-container {
        grid-template-columns: 1fr;
    }

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

    .results-dashboard .result-card.primary {
        grid-column: 1 / -1;
    }

    .doc-diff-tool .summary-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .doc-diff-tool .classification-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .doc-diff-tool .algorithm-steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .doc-diff-tool .step:nth-child(2)::after {
        display: none;
    }

    .doc-diff-tool .quality-metric {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .ddt-header {
        padding: 1.5rem;
    }

    .doc-diff-tool .header-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }

    .doc-diff-tool .header-text h2 {
        font-size: 1.25rem;
    }

    .doc-diff-tool .mode-tab {
        min-width: 100px;
        padding: 0.85rem 1rem;
        font-size: 0.85rem;
    }

    .doc-diff-tool .mode-tab span {
        display: none;
    }

    .text-input-card textarea {
        min-height: 200px;
    }

    .results-dashboard {
        grid-template-columns: repeat(2, 1fr);
    }

    .view-tabs {
        flex-direction: column;
    }

    .view-tab {
        width: 100%;
    }

    .diff-filters {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 0.5rem;
    }

    .filter-btn {
        flex-shrink: 0;
    }

    .settings-grid {
        grid-template-columns: 1fr;
    }

    .setting-group.checkboxes {
        grid-template-columns: 1fr;
    }

    .ddt-actions {
        flex-direction: column;
    }

    .ddt-actions button {
        width: 100%;
    }

    .ddt-export {
        flex-direction: column;
    }

    .doc-diff-tool .btn-export {
        width: 100%;
        justify-content: center;
    }

    .algorithm-steps {
        grid-template-columns: 1fr;
    }

    .step::after {
        display: none !important;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }

    .header-badges {
        justify-content: center;
        width: 100%;
    }

    .results-dashboard {
        grid-template-columns: 1fr;
    }

    .result-card.primary {
        flex-direction: column;
        text-align: center;
    }

    .summary-stats {
        grid-template-columns: 1fr;
    }

    .classification-grid {
        grid-template-columns: 1fr;
    }

    .review-stats {
        flex-direction: column;
        gap: 0.75rem;
    }

    .heatmap-legend {
        flex-direction: column;
    }

    .panel-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
}

/* =====================================================
   DARK THEME ENHANCEMENTS
===================================================== */
.dark-theme .doc-diff-tool .ddt-header {
    background: linear-gradient(135deg,
            rgba(var(--primary-rgb), 0.12) 0%,
            rgba(var(--secondary-rgb), 0.08) 100%);
}

.dark-theme .doc-diff-tool .text-input-card textarea,
.dark-theme .doc-diff-tool .diff-content,
.dark-theme .doc-diff-tool .inline-diff-content,
.dark-theme .doc-diff-tool .unified-diff-content {
    background: rgba(0, 0, 0, 0.2);
}

.dark-theme .doc-diff-tool .diff-line.added {
    background: rgba(46, 204, 113, 0.12);
}

.dark-theme .doc-diff-tool .diff-line.removed {
    background: rgba(231, 76, 60, 0.12);
}

.dark-theme .doc-diff-tool .diff-line.modified {
    background: rgba(241, 196, 15, 0.12);
}

.dark-theme .doc-diff-tool .diff-line.moved {
    background: rgba(155, 89, 182, 0.12);
}

.dark-theme .doc-diff-tool .word-added {
    background: rgba(46, 204, 113, 0.25);
}

.dark-theme .doc-diff-tool .word-removed {
    background: rgba(231, 76, 60, 0.25);
}

.dark-theme .doc-diff-tool .word-modified {
    background: rgba(241, 196, 15, 0.25);
}

/* =====================================================
   SCROLLBAR STYLING
===================================================== */
.doc-diff-tool .diff-content::-webkit-scrollbar,
.doc-diff-tool .inline-diff-content::-webkit-scrollbar,
.doc-diff-tool .unified-diff-content::-webkit-scrollbar,
.doc-diff-tool .heatmap-content::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.doc-diff-tool .diff-content::-webkit-scrollbar-track,
.doc-diff-tool .inline-diff-content::-webkit-scrollbar-track,
.doc-diff-tool .unified-diff-content::-webkit-scrollbar-track,
.doc-diff-tool .heatmap-content::-webkit-scrollbar-track {
    background: rgba(var(--primary-rgb), 0.05);
    border-radius: 4px;
}

.doc-diff-tool .diff-content::-webkit-scrollbar-thumb,
.doc-diff-tool .inline-diff-content::-webkit-scrollbar-thumb,
.doc-diff-tool .unified-diff-content::-webkit-scrollbar-thumb,
.doc-diff-tool .heatmap-content::-webkit-scrollbar-thumb {
    background: rgba(var(--primary-rgb), 0.2);
    border-radius: 4px;
}

.doc-diff-tool .diff-content::-webkit-scrollbar-thumb:hover,
.doc-diff-tool .inline-diff-content::-webkit-scrollbar-thumb:hover,
.doc-diff-tool .unified-diff-content::-webkit-scrollbar-thumb:hover,
.doc-diff-tool .heatmap-content::-webkit-scrollbar-thumb:hover {
    background: rgba(var(--primary-rgb), 0.35);
}

/* =====================================================
   LOADING & ANIMATION STATES
===================================================== */
.doc-diff-tool .loading {
    position: relative;
    pointer-events: none;
}

.doc-diff-tool .loading::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(var(--card-background), 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.doc-diff-tool .spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Toast Notifications */
.doc-diff-tool .toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    z-index: 1000;
    animation: slideInRight 0.4s ease;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.doc-diff-tool .toast.success {
    border-color: #27ae60;
}

.doc-diff-tool .toast.success i {
    color: #27ae60;
}

.doc-diff-tool .toast.error {
    border-color: #e74c3c;
}

.doc-diff-tool .toast.error i {
    color: #e74c3c;
}

/* =====================================================
   PRINT STYLES
===================================================== */
@media print {

    .doc-diff-tool .ddt-header,
    .doc-diff-tool .ddt-mode-tabs,
    .doc-diff-tool .ddt-settings,
    .doc-diff-tool .ddt-actions,
    .doc-diff-tool .ddt-export,
    .doc-diff-tool .ddt-algorithm-info,
    .doc-diff-tool .annotations-panel,
    .doc-diff-tool .review-panel {
        display: none !important;
    }

    .doc-diff-tool .ddt-results {
        display: block !important;
    }

    .doc-diff-tool .diff-content,
    .doc-diff-tool .inline-diff-content {
        max-height: none !important;
        overflow: visible !important;
    }
}