.tool-title-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--primary-light);
}

.tool-title-wrapper i {
    font-size: 2rem;
    color: var(--primary-color);
}

.tool-title-wrapper .tool-title {
    margin-bottom: 0;
    border-bottom: none;
}

.config-section {
    margin-bottom: 16px;
}

.config-row {
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.config-row .form-group {
    flex: 1;
    min-width: 150px;
}

.range-inputs {
    display: flex;
    align-items: center;
    gap: 8px;
}

.range-inputs .form-input {
    flex: 1;
}

.range-separator {
    color: var(--text-muted);
    font-weight: 500;
}

.count-input-wrapper {
    position: relative;
}

.count-input {
    padding-right: 40px;
}

.count-suffix {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 14px;
}

.checkbox-group {
    flex: 0 0 auto;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    user-select: none;
}

.checkbox-label input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkbox-custom {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    position: relative;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.checkbox-label input:checked ~ .checkbox-custom {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-label input:checked ~ .checkbox-custom::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 1px;
    width: 4px;
    height: 9px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.preset-ranges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.preset-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-right: 4px;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.action-row {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.btn-large {
    flex: 1;
    padding: 12px 24px;
    font-size: 15px;
}

.result-section {
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.result-section h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.result-display {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    min-height: 80px;
}

.placeholder-text {
    color: var(--text-muted);
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 60px;
}

.port-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.port-item {
    display: flex;
    align-items: center;
    gap: 6px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px 10px;
    transition: var(--transition-fast);
}

.port-item:hover {
    border-color: var(--primary-color);
    box-shadow: 0 2px 6px rgba(45, 140, 240, 0.12);
}

.port-number {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 45px;
    text-align: center;
}

.port-copy-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 4px;
    transition: var(--transition-fast);
    font-size: 13px;
}

.port-copy-btn:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

.result-stats {
    margin-top: 10px;
    font-size: 13px;
    color: var(--text-muted);
    text-align: right;
}

.result-stats #resultCount {
    color: var(--primary-color);
    font-weight: 600;
}

.result-stats #resultRange {
    font-family: 'Consolas', 'Monaco', monospace;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .config-row {
        flex-direction: column;
        gap: 10px;
    }

    .action-row {
        flex-direction: column;
    }

    .preset-ranges {
        justify-content: center;
    }
}