/* CSS Variables for Database Migration Theme */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #3b82f6;
    
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border-color: #334155;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
.header {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.header-content {
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.logo-icon {
    width: 48px;
    height: 48px;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Progress Steps */
.progress-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--text-muted);
    transition: var(--transition);
}

.step-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
    transition: var(--transition);
}

.step.active .step-number {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.5);
}

.step.active .step-label {
    color: var(--text-primary);
}

.step.completed .step-number {
    background: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.step.completed .step-label {
    color: var(--success-color);
}

.step-line {
    width: 120px;
    height: 2px;
    background: var(--border-color);
    margin: 0 1rem;
}

/* Cards */
.card {
    background: var(--bg-card);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.card-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(59, 130, 246, 0.05));
}

.card-icon {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
}

.card-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.card-body {
    padding: 2rem;
}

.card-footer {
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    background: rgba(15, 23, 42, 0.5);
}

/* Form Sections */
.form-section {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.form-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.form-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-icon {
    width: 24px;
    height: 24px;
    color: var(--primary-color);
}

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

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input[type="text"],
.form-group input[type="password"] {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    padding: 0.75rem;
    border-radius: 8px;
    transition: var(--transition);
}

.checkbox-label:hover {
    background: rgba(37, 99, 235, 0.05);
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

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

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn i {
    width: 18px;
    height: 18px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

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

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Step Content */
.step-content {
    display: none;
}

.step-content.active {
    display: block;
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Info Box */
.info-box {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 2rem;
    display: flex;
    gap: 1rem;
}

.info-box i {
    width: 24px;
    height: 24px;
    color: var(--info-color);
    flex-shrink: 0;
}

.info-box strong {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.info-box p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0;
}

/* File Upload */
.file-upload {
    position: relative;
    margin-bottom: 1rem;
}

.file-upload input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.file-upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 3rem;
    background: var(--bg-tertiary);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.file-upload-label:hover {
    border-color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
}

.file-upload-label i {
    width: 48px;
    height: 48px;
    color: var(--primary-color);
}

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

/* Mapping Preview */
.mapping-preview {
    background: var(--bg-tertiary);
    border-radius: 8px;
    padding: 1rem;
    margin-top: 1rem;
    max-height: 300px;
    overflow-y: auto;
}

/* Migration Status */
.migration-status {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.status-item {
    background: var(--bg-tertiary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.status-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.status-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 2rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #3b82f6);
    width: 0%;
    transition: width 0.5s ease;
}

/* Migration Phases */
.migration-phases {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.phase {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: var(--transition);
}

.phase-icon {
    width: 48px;
    height: 48px;
    background: rgba(37, 99, 235, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.phase-icon i {
    width: 24px;
    height: 24px;
    color: var(--primary-color);
}

.phase-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.phase-content p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.phase-status {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.phase.active {
    border-color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
}

.phase.active .phase-status {
    color: var(--primary-color);
}

.phase.completed {
    border-color: var(--success-color);
}

.phase.completed .phase-icon {
    background: rgba(16, 185, 129, 0.1);
}

.phase.completed .phase-icon i {
    color: var(--success-color);
}

.phase.completed .phase-status {
    color: var(--success-color);
}

/* Log Container */
.log-container {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.log-header {
    padding: 1rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.log-header i {
    width: 18px;
    height: 18px;
}

.log-content {
    padding: 1rem;
    max-height: 400px;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
}

.log-entry {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(51, 65, 85, 0.3);
}

.log-entry:last-child {
    border-bottom: none;
}

.log-entry.success {
    color: var(--success-color);
}

.log-entry.error {
    color: var(--error-color);
}

.log-entry.warning {
    color: var(--warning-color);
}

/* Validation Summary */
.validation-summary {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.summary-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.summary-card i {
    width: 48px;
    height: 48px;
}

.summary-card.success {
    border-color: var(--success-color);
    background: rgba(16, 185, 129, 0.05);
}

.summary-card.success i {
    color: var(--success-color);
}

.summary-card.info {
    border-color: var(--info-color);
    background: rgba(59, 130, 246, 0.05);
}

.summary-card.info i {
    color: var(--info-color);
}

.summary-card.warning {
    border-color: var(--warning-color);
    background: rgba(245, 158, 11, 0.05);
}

.summary-card.warning i {
    color: var(--warning-color);
}

.summary-card.error {
    border-color: var(--error-color);
    background: rgba(239, 68, 68, 0.05);
}

.summary-card.error i {
    color: var(--error-color);
}

.summary-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.summary-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Validation Checks */
.validation-checks {
    margin-bottom: 2rem;
}

.validation-checks h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.check-list {
    display: grid;
    gap: 0.75rem;
}

.check-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition);
}

.check-item i {
    width: 24px;
    height: 24px;
}

.check-item.pending i {
    color: var(--text-muted);
    animation: spin 1s linear infinite;
}

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

.check-item.success i {
    color: var(--success-color);
}

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

.check-item.error i {
    color: var(--error-color);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Table Comparison */
.table-comparison h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.comparison-table {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th {
    background: var(--bg-primary);
    padding: 1rem;
    text-align: left;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table td {
    padding: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(51, 65, 85, 0.3);
}

.comparison-table tbody tr:last-child td {
    border-bottom: none;
}

.comparison-table tbody tr:hover {
    background: rgba(37, 99, 235, 0.05);
}

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

/* Footer */
.footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .migration-phases,
    .validation-summary {
        grid-template-columns: 1fr;
    }
    
    .migration-status {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .progress-steps {
        flex-direction: column;
        gap: 1rem;
    }
    
    .step-line {
        width: 2px;
        height: 40px;
        margin: 0;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .card-footer {
        flex-direction: column;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}