.main-params {
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
    margin: 0 auto;
}

.param-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 200px;
}

.param-group label {
    color: #f0f0f0;
    font-weight: bold;
    font-size: 1.1em;
}

.param-group select {
    padding: 12px;
    background-color: #0d0d0d;
    border: 2px solid #ff3b3b;
    color: #f0f0f0;
    border-radius: 5px;
    font-size: 1em;
}

.param-group select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Tabs */
.tabs-container {
    background-color: #1a1a1a;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 30px;
}

.tabs-header {
    display: flex;
    background-color: #2a2a2a;
}

.tab-btn {
    flex: 1;
    padding: 20px;
    background-color: transparent;
    border: none;
    color: #f0f0f0;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.tab-btn:hover {
    background-color: #3a3a3a;
    color: #ff3b3b;
}

.tab-btn.active {
    background-color: #ff3b3b;
    color: #0d0d0d;
}

.tab-content {
    display: none;
    padding: 30px;
}

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

/* Forms */
.upload-form {
    max-width: 800px;
    margin: 0 auto;
}

.form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    color: #f0f0f0;
    font-weight: bold;
    font-size: 1em;
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 12px;
    background-color: #0d0d0d;
    border: 1px solid #ff3b3b;
    color: #f0f0f0;
    border-radius: 5px;
    font-size: 1em;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #ff6b6b;
    box-shadow: 0 0 5px rgba(255, 59, 59, 0.3);
}

.form-group input:required {
    border-left: 4px solid #ff3b3b;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Optional fields section */
.optional-fields {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid #3a3a3a;
}

.optional-fields h3 {
    color: #ff3b3b;
    margin-bottom: 20px;
    font-size: 1.5em;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* File upload */
.file-upload-area {
    position: relative;
    margin-bottom: 30px;
}

.file-upload-area input[type="file"] {
    position: absolute;
    left: -9999px;
    opacity: 0;
}

.file-upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 50px;
    border: 3px dashed #ff3b3b;
    border-radius: 10px;
    background-color: #0d0d0d;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

.file-upload-label:hover {
    background-color: #1a1a1a;
    border-color: #ff6b6b;
}

.file-upload-label i {
    font-size: 3em;
    color: #ff3b3b;
    margin-bottom: 15px;
}

.file-upload-label span {
    color: #f0f0f0;
    font-size: 1.2em;
    font-weight: bold;
}

/* Column mapping */
.column-mapping {
    background-color: #2a2a2a;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 30px;
    border: 1px solid #ff3b3b;
}

.column-mapping h3 {
    color: #ff3b3b;
    margin-bottom: 20px;
    font-size: 1.3em;
    text-transform: uppercase;
}

/* Default values */
.default-values {
    background-color: #2a2a2a;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 30px;
    border: 1px solid #ff3b3b;
}

.default-values h3 {
    color: #ff3b3b;
    margin-bottom: 20px;
    font-size: 1.3em;
    text-transform: uppercase;
}

/* Log info */
.log-info {
    background-color: #2a2a2a;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
    border-left: 4px solid #ff3b3b;
}

.log-info p {
    margin: 8px 0;
    color: #f0f0f0;
}

.log-info strong {
    color: #ff3b3b;
}

/* Submit button */
.submit-btn {
    width: 100%;
    padding: 18px;
    background-color: #ff3b3b;
    color: #0d0d0d;
    border: none;
    border-radius: 8px;
    font-size: 1.2em;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 20px;
}

.submit-btn:hover {
    background-color: #ff6b6b;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 59, 59, 0.3);
}

.submit-btn:active {
    transform: translateY(0);
}

.submit-btn:disabled {
    background-color: #666;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Statistics section */
.stats-section {
    background-color: #1a1a1a;
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 30px;
    border: 1px solid #ff3b3b;
}

.stats-section h3 {
    color: #ff3b3b;
    margin-bottom: 20px;
    font-size: 1.5em;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.stat-item {
    background-color: #2a2a2a;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    border: 1px solid #3a3a3a;
}

.stat-label {
    display: block;
    font-size: 0.9em;
    color: #f0f0f0;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-value {
    display: block;
    font-size: 2em;
    font-weight: bold;
    color: #ff3b3b;
}

.stat-item.stat-valid .stat-value {
    color: #4CAF50;
}

.stat-item.stat-duplicates .stat-value {
    color: #ff9800;
}

.stat-item.stat-bad-email .stat-value,
.stat-item.stat-bad-phone .stat-value,
.stat-item.stat-other .stat-value {
    color: #f44336;
}

/* Logs section */
.logs-section {
    background-color: #1a1a1a;
    padding: 30px;
    border-radius: 10px;
}

.logs-section h3 {
    color: #ff3b3b;
    margin-bottom: 20px;
    font-size: 1.5em;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.logs-container {
    background-color: #0d0d0d;
    border: 1px solid #3a3a3a;
    border-radius: 8px;
    padding: 20px;
    max-height: 400px;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    line-height: 1.6;
}

.logs-container p {
    margin: 0;
    color: #f0f0f0;
}

.log-entry {
    margin-bottom: 8px;
    padding: 8px;
    border-radius: 4px;
    border-left: 3px solid transparent;
}

.log-entry.success {
    border-left-color: #4CAF50;
    background-color: rgba(76, 175, 80, 0.1);
    color: #4CAF50;
}

.log-entry.error {
    border-left-color: #f44336;
    background-color: rgba(244, 67, 54, 0.1);
    color: #f44336;
}

.log-entry.info {
    border-left-color: #2196F3;
    background-color: rgba(33, 150, 243, 0.1);
    color: #2196F3;
}

/* Loading spinner */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #ff3b3b;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Validation styles */
.form-group input.invalid,
.form-group textarea.invalid {
    border-color: #f44336;
    box-shadow: 0 0 5px rgba(244, 67, 54, 0.3);
}

.form-group input.valid,
.form-group textarea.valid {
    border-color: #4CAF50;
    box-shadow: 0 0 5px rgba(76, 175, 80, 0.3);
}

.error-message {
    color: #f44336;
    font-size: 0.9em;
    margin-top: 5px;
}

.success-message {
    color: #4CAF50;
    font-size: 0.9em;
    margin-top: 5px;
}

/* Responsive design */
@media (max-width: 768px) {
    .main-params {
        flex-direction: column;
        gap: 20px;
    }

    .form-row {
        flex-direction: column;
        gap: 15px;
    }

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

    .tab-btn {
        padding: 15px;
        font-size: 1em;
    }

    .tab-content {
        padding: 20px;
    }

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

@media (max-width: 480px) {
    .param-group {
        min-width: auto;
    }

    .file-upload-label {
        padding: 30px 20px;
    }

    .file-upload-label i {
        font-size: 2em;
    }

    .file-upload-label span {
        font-size: 1em;
    }
}