/* Plagiarism Checker Tool Styles */

:root {
    --primary-color: #7c3aed;
    --primary-hover: #6d28d9;
    --secondary-color: #1e293b;
    --accent-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    --error-color: #ef4444;
    --light-bg: #f8fafc;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --gradient-start: #7c3aed;
    --gradient-end: #1e293b;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --transition: all 0.2s ease-in-out;
}

/* Tool Main Container */
.tool-main {
    padding: 2rem 0;
    background: var(--light-bg);
    min-height: calc(100vh - 200px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Tool Header */
.tool-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-radius: var(--border-radius-lg);
    color: white;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.tool-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="white" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    pointer-events: none;
}

.tool-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 1rem 0;
    position: relative;
    z-index: 1;
}

.tool-header h1 i {
    margin-right: 1rem;
    color: var(--accent-color);
}

.tool-header p {
    font-size: 1.1rem;
    margin: 0;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
}

/* Tab Navigation */
.tab-container {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.tab-nav {
    display: flex;
    background: var(--secondary-color);
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: 1.2rem 1.5rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tab-btn:hover {
    background: rgba(124, 58, 237, 0.1);
    color: var(--primary-color);
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}

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

/* Tab Content */
.tab-content {
    display: none;
    padding: 2rem;
}

.tab-content.active {
    display: block;
}

.tool-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

/* Input Section */
.input-section {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.input-group label i {
    color: var(--primary-color);
}

.input-group input,
.input-group textarea,
.input-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background: white;
}

.input-group input:focus,
.input-group textarea:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.input-group textarea {
    resize: vertical;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.5;
}

.input-stats {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Input Actions */
.input-actions {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: var(--text-secondary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.btn-secondary:hover {
    background: var(--secondary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-icon {
    background: var(--light-bg);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.btn-icon:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.btn-small {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
}

/* Quick Examples */
.quick-examples {
    margin-bottom: 1.5rem;
}

.quick-examples label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.example-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.example-btn {
    background: var(--light-bg);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius);
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
}

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

/* Settings */
.check-settings,
.batch-settings,
.search-options {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

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

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
    accent-color: var(--primary-color);
}

.setting-group,
.option-group {
    margin-bottom: 1rem;
}

.setting-group label,
.option-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

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

/* File Drop Zone */
.file-drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    background: var(--light-bg);
}

.file-drop-zone:hover,
.file-drop-zone.dragover {
    border-color: var(--primary-color);
    background: rgba(124, 58, 237, 0.05);
}

.file-drop-zone i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: block;
}

.file-drop-zone p {
    margin: 0 0 0.5rem 0;
    font-weight: 600;
    color: var(--text-primary);
}

.file-drop-zone span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Result Section */
.result-section {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    min-height: 400px;
    display: flex;
    flex-direction: column;
}

.result-container {
    flex: 1;
}

.result-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    text-align: center;
}

.result-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.result-placeholder p {
    margin: 0;
    font-size: 1.1rem;
}

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

.result-status {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-muted);
}

.status-indicator.excellent {
    background: var(--success-color);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.status-indicator.good {
    background: var(--info-color);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.2);
}

.status-indicator.warning {
    background: var(--warning-color);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}

.status-indicator.danger {
    background: var(--error-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

.status-text {
    font-weight: 600;
    color: var(--text-primary);
}

.similarity-score {
    text-align: center;
}

.score-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.score-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Result Details */
.result-details {
    margin-bottom: 1.5rem;
}

.result-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

/* Analysis Results */
.analysis-summary {
    margin-bottom: 1.5rem;
}

.analysis-summary h3 {
    margin: 0 0 1rem 0;
    color: var(--text-primary);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--light-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

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

.summary-value {
    font-weight: 600;
    color: var(--primary-color);
}

.sources-section {
    margin-bottom: 1.5rem;
}

.sources-section h3 {
    margin: 0 0 1rem 0;
    color: var(--text-primary);
}

.source-item {
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 0.75rem;
}

.source-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.source-header h4 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1rem;
}

.similarity-badge {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius);
    font-size: 0.8rem;
    font-weight: 600;
}

.source-url {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0.5rem 0;
    word-break: break-all;
}

.source-type {
    background: var(--text-secondary);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius);
    font-size: 0.75rem;
    text-transform: uppercase;
}

.highlighted-text {
    margin-top: 1.5rem;
}

.highlighted-text h3 {
    margin: 0 0 1rem 0;
    color: var(--text-primary);
}

.text-preview {
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    line-height: 1.6;
    max-height: 300px;
    overflow-y: auto;
}

.highlight-similar {
    background-color: #fef3c7;
    padding: 0.1rem 0.2rem;
    border-radius: 0.2rem;
}

.highlight-duplicate {
    background-color: #fecaca;
    padding: 0.1rem 0.2rem;
    border-radius: 0.2rem;
}

/* Batch Summary */
.batch-summary {
    margin-bottom: 1.5rem;
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.stat-card {
    background: var(--light-bg);
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--border-color);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Batch Results */
.batch-files-list {
    max-height: 400px;
    overflow-y: auto;
}

.batch-file-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 0.75rem;
    transition: var(--transition);
}

.batch-file-item.flagged {
    border-color: var(--error-color);
    background: rgba(239, 68, 68, 0.05);
}

.batch-file-item.clean {
    border-color: var(--success-color);
    background: rgba(16, 185, 129, 0.05);
}

.file-info h4 {
    margin: 0 0 0.5rem 0;
    color: var(--text-primary);
}

.file-stats {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.similarity-score {
    font-weight: 600;
    color: var(--primary-color);
}

.sources-count {
    color: var(--text-secondary);
}

.status-badge {
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-badge.flagged {
    background: var(--error-color);
    color: white;
}

.status-badge.clean {
    background: var(--success-color);
    color: white;
}

/* Sources */
.sources-summary {
    margin-bottom: 1.5rem;
}

.sources-summary h3 {
    margin: 0 0 1rem 0;
    color: var(--text-primary);
}

.filter-options {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--light-bg);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius);
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.sources-list {
    max-height: 300px;
    overflow-y: auto;
}

/* Source Results */
.source-result-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 0.75rem;
}

.source-description {
    color: var(--text-secondary);
    margin: 0.5rem 0;
    font-size: 0.9rem;
}

.source-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.75rem;
}

/* History */
.history-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

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

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

.history-filters {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

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

.filter-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.history-list {
    max-height: 400px;
    overflow-y: auto;
}

.no-history {
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
    padding: 2rem;
}

.history-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 0.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.history-item:hover {
    box-shadow: var(--shadow-md);
}

.history-content {
    flex: 1;
}

.history-text {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.history-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
}

.history-date {
    color: var(--text-secondary);
}

.history-score {
    font-weight: 600;
    padding: 0.2rem 0.4rem;
    border-radius: var(--border-radius);
    font-size: 0.75rem;
}

.history-score.excellent {
    background: var(--success-color);
    color: white;
}

.history-score.good {
    background: var(--info-color);
    color: white;
}

.history-score.warning {
    background: var(--warning-color);
    color: white;
}

.history-score.danger {
    background: var(--error-color);
    color: white;
}

.history-sources {
    color: var(--text-secondary);
}

/* Toast Notifications */
.toast {
    position: fixed;
    top: 1rem;
    right: 1rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    max-width: 350px;
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--error-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

.toast.info {
    border-left: 4px solid var(--info-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .tab-nav {
        flex-direction: column;
    }
    
    .tab-btn {
        justify-content: flex-start;
        padding: 1rem 1.5rem;
    }
    
    .tool-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .input-actions {
        flex-direction: column;
    }
    
    .btn-primary,
    .btn-secondary,
    .btn-icon {
        width: 100%;
        justify-content: center;
    }
    
    .example-buttons {
        flex-direction: column;
    }
    
    .example-btn {
        width: 100%;
        text-align: center;
    }
    
    .summary-stats {
        grid-template-columns: 1fr;
    }
    
    .summary-grid {
        grid-template-columns: 1fr;
    }
    
    .history-filters {
        grid-template-columns: 1fr;
    }
    
    .history-controls {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
    
    .history-actions {
        justify-content: center;
    }
    
    .filter-options {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .tool-main {
        padding: 1rem 0;
    }
    
    .container {
        padding: 0 0.5rem;
    }
    
    .tool-header {
        padding: 1.5rem 1rem;
        margin-bottom: 2rem;
    }
    
    .tool-header h1 {
        font-size: 2rem;
    }
    
    .tab-content {
        padding: 1rem;
    }
    
    .input-section,
    .result-section {
        padding: 1rem;
    }
}